Export fails when an application does not have a description.

2007-06-14 14:33:04,238 ERROR [com.opensymphony.webwork.dispatcher.DispatcherUtils] Could not execute action
java.lang.IllegalArgumentException: Adding text to an XML document must not be null
	at org.dom4j.DocumentFactory.createText(DocumentFactory.java:174)
	at org.dom4j.tree.AbstractElement.addText(AbstractElement.java:899)
	at com.atlassian.crowd.migration.ApplicationMapper.exportXml(ApplicationMapper.java:98)
	at com.atlassian.crowd.migration.XmlMigrator.exportXml(XmlMigrator.java:82)
	at com.atlassian.crowd.console.action.admin.Backup.doExport(Backup.java:58)
	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
	at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
	at java.lang.reflect.Method.invoke(Method.java:597)