Fix for bug 731173 (SetVersionHelper should release mOpenRequest). r=bent.

--HG--
extra : rebase_source : c247f36421e2e3bdc8d7ebceca440da5653e4f29

dom/indexedDB/OpenDatabaseHelper.cpp

@@ -2323,6 +2323,7 @@ SetVersionHelper::NotifyTransactionComplete(IDBTransaction* aTransaction)
   }
 
   mOpenRequest->SetTransaction(nsnull);
+  mOpenRequest = nsnull;
 
   rv = mOpenHelper->NotifySetVersionFinished();
   mOpenHelper = nsnull;