NPE when synchronizing pull request with deleted source repository on GitHub

[INFO] [talledLocalContainer] 2014-04-23 20:04:25,761 [pool-14-thread-1] ERROR [dvcs.service.message.MessageConsumer] 
[INFO] [talledLocalContainer] java.lang.NullPointerException
[INFO] [talledLocalContainer] 	at com.atlassian.jira.plugins.dvcs.sync.GitHubPullRequestSynchronizeMessageConsumer.getRepositoryFullName(GitHubPullRequestSynchronizeMessageConsumer.java:344)
[INFO] [talledLocalContainer] 	at com.atlassian.jira.plugins.dvcs.sync.GitHubPullRequestSynchronizeMessageConsumer.map(GitHubPullRequestSynchronizeMessageConsumer.java:311)
[INFO] [talledLocalContainer] 	at com.atlassian.jira.plugins.dvcs.sync.GitHubPullRequestSynchronizeMessageConsumer.updateLocalPullRequest(GitHubPullRequestSynchronizeMessageConsumer.java:131)
[INFO] [talledLocalContainer] 	at com.atlassian.jira.plugins.dvcs.sync.GitHubPullRequestSynchronizeMessageConsumer.onReceive(GitHubPullRequestSynchronizeMessageConsumer.java:105)
[INFO] [talledLocalContainer] 	at com.atlassian.jira.plugins.dvcs.sync.GitHubPullRequestSynchronizeMessageConsumer.onReceive(GitHubPullRequestSynchronizeMessageConsumer.java:40)
[INFO] [talledLocalContainer] 	at com.atlassian.jira.plugins.dvcs.service.MessageExecutor$MessageRunnable.run(MessageExecutor.java:268)
[INFO] [talledLocalContainer] 	at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:895)
[INFO] [talledLocalContainer] 	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:918)
[INFO] [talledLocalContainer] 	at java.lang.Thread.run(Thread.java:695)