New screenshot applet throws exception if no image is defined

[INFO] [talledLocalContainer] Mai 13, 2014 12:10:45 PM org.apache.catalina.core.StandardWrapperValve invoke
[INFO] [talledLocalContainer] Schwerwiegend: Servlet.service() for servlet [action] in context with path [/jira] threw exception [java.lang.NumberForm
atException: For input string: ""] with root cause
[INFO] [talledLocalContainer] java.lang.NumberFormatException: For input string: ""
[INFO] [talledLocalContainer]   at java.lang.NumberFormatException.forInputString(NumberFormatException.java:65)
[INFO] [talledLocalContainer]   at java.lang.Long.parseLong(Long.java:453)
[INFO] [talledLocalContainer]   at java.lang.Long.parseLong(Long.java:483)
[INFO] [talledLocalContainer]   at com.atlassian.plugins.jira.screenshot.webwork.ShowAttachScreenshotFormAction$1.get(ShowAttachScreenshotFormAction.j
ava:275)
[INFO] [talledLocalContainer]   at com.atlassian.plugins.jira.screenshot.webwork.ShowAttachScreenshotFormAction$1.get(ShowAttachScreenshotFormAction.j
ava:272)
[INFO] [talledLocalContainer]   at com.atlassian.jira.util.collect.TransformingIterator.next(TransformingIterator.java:38)
[INFO] [talledLocalContainer]   at com.atlassian.jira.util.collect.CollectionUtil.foreach(CollectionUtil.java:44)
[INFO] [talledLocalContainer]   at com.atlassian.jira.util.collect.CollectionUtil.toList(CollectionUtil.java:73)
[INFO] [talledLocalContainer]   at com.atlassian.jira.util.collect.CollectionUtil.transform(CollectionUtil.java:142)
[INFO] [talledLocalContainer]   at com.atlassian.jira.util.collect.CollectionUtil.transform(CollectionUtil.java:164)
[INFO] [talledLocalContainer]   at com.atlassian.plugins.jira.screenshot.webwork.ShowAttachScreenshotFormAction.getTemporaryFileIdsToConvert(ShowAttac
hScreenshotFormAction.java:271)
[INFO] [talledLocalContainer]   at com.atlassian.plugins.jira.screenshot.webwork.ShowAttachScreenshotFormAction.doExecute(ShowAttachScreenshotFormActi
on.java:287)
[INFO] [talledLocalContainer]   at webwork.action.ActionSupport.execute(ActionSupport.java:165)
[INFO] [talledLocalContainer]   at com.atlassian.jira.action.JiraActionSupport.execute(JiraActionSupport.java:87)
[INFO] [talledLocalContainer]   at webwork.interceptor.DefaultInterceptorChain.proceed(DefaultInterceptorChain.java:39)
[INFO] [talledLocalContainer]   at webwork.interceptor.NestedInterceptorChain.proceed(NestedInterceptorChain.java:31)
[INFO] [talledLocalContainer]   at webwork.interceptor.ChainedInterceptor.intercept(ChainedInterceptor.java:16)
[INFO] [talledLocalContainer]   at webwork.interceptor.DefaultInterceptorChain.proceed(DefaultInterceptorChain.java:35)
[INFO] [talledLocalContainer]   at webwork.dispatcher.GenericDispatcher.executeAction(GenericDispatcher.java:225)
[INFO] [talledLocalContainer]   at webwork.dispatcher.GenericDispatcher.executeAction(GenericDispatcher.java:154)
[INFO] [talledLocalContainer]   at com.atlassian.jira.web.dispatcher.JiraWebworkActionDispatcher.service(JiraWebworkActionDispatcher.java:152)
[INFO] [talledLocalContainer]   at javax.servlet.http.HttpServlet.service(HttpServlet.java:728)
[INFO] [talledLocalContainer]   at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:305)
[INFO] [talledLocalContainer]   at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:210)
[INFO] [talledLocalContainer]   at com.atlassian.jira.web.filters.steps.ChainedFilterStepRunner.doFilter(ChainedFilterStepRunner.java:87)
[INFO] [talledLocalContainer]   at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:243)
[INFO] [talledLocalContainer]   at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:210)
[INFO] [talledLocalContainer]   at com.atlassian.jira.web.filters.XContentTypeOptionsNoSniffFilter.doFilter(XContentTypeOptionsNoSniffFilter.java:22)
[INFO] [talledLocalContainer]   at com.atlassian.core.filters.AbstractHttpFilter.doFilter(AbstractHttpFilter.java:31)
[INFO] [talledLocalContainer]   at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:243)
[INFO] [talledLocalContainer]   at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:210)
[INFO] [talledLocalContainer]   at com.atlassian.core.filters.HeaderSanitisingFilter.doFilter(HeaderSanitisingFilter.java:44)
[INFO] [talledLocalContainer]   at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:243)
[INFO] [talledLocalContainer]   at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:210)
[INFO] [talledLocalContainer]   at com.atlassian.plugin.servlet.filter.IteratingFilterChain.doFilter(IteratingFilterChain.java:46)
[INFO] [talledLocalContainer]   at com.atlassian.plugin.servlet.filter.DelegatingPluginFilter$1.doFilter(DelegatingPluginFilter.java:66)
[INFO] [talledLocalContainer]   at com.atlassian.jira.tzdetect.IncludeResourcesFilter.doFilter(IncludeResourcesFilter.java:39)
[INFO] [talledLocalContainer]   at com.atlassian.plugin.servlet.filter.DelegatingPluginFilter.doFilter(DelegatingPluginFilter.java:74)
[INFO] [talledLocalContainer]   at com.atlassian.plugin.servlet.filter.IteratingFilterChain.doFilter(IteratingFilterChain.java:42)
[INFO] [talledLocalContainer]   at com.atlassian.plugin.servlet.filter.DelegatingPluginFilter$1.doFilter(DelegatingPluginFilter.java:66)
[INFO] [talledLocalContainer]   at com.atlassian.jira.baseurl.IncludeResourcesFilter.doFilter(IncludeResourcesFilter.java:38)
[INFO] [talledLocalContainer]   at com.atlassian.core.filters.AbstractHttpFilter.doFilter(AbstractHttpFilter.java:31)
[INFO] [talledLocalContainer]   at com.atlassian.plugin.servlet.filter.DelegatingPluginFilter.doFilter(DelegatingPluginFilter.java:74)
[INFO] [talledLocalContainer]   at com.atlassian.plugin.servlet.filter.IteratingFilterChain.doFilter(IteratingFilterChain.java:42)
[INFO] [talledLocalContainer]   at com.atlassian.plugin.servlet.filter.DelegatingPluginFilter$1.doFilter(DelegatingPluginFilter.java:66)
[INFO] [talledLocalContainer]   at com.atlassian.applinks.core.rest.context.ContextFilter.doFilter(ContextFilter.java:25)
[INFO] [talledLocalContainer]   at com.atlassian.plugin.servlet.filter.DelegatingPluginFilter.doFilter(DelegatingPluginFilter.java:74)