Bug 339518: Switching IMAP folders while "mark-as-spam" is running causes a crash [@ nsMsgDBView::DeleteMessages], patch by Adam Guthrie <ispiked@gmail.com>, r+sr=bienvenu, a=dveditz

git-svn-id: svn://10.0.0.236/branches/MOZILLA_1_8_0_BRANCH@207693 18797224-902f-48f8-a5cc-f745e15eee43

mozilla/mailnews/base/src/nsMsgDBView.cpp

@@ -1864,6 +1864,11 @@ NS_IMETHODIMP nsMsgDBView::Close()
   m_flags.RemoveAll();
   m_levels.RemoveAll();
 
+  // clear these out since they no longer apply if we're switching a folder
+  nsMemory::Free(mJunkIndices);
+  mJunkIndices = nsnull;
+  mNumJunkIndices = 0;
+
   // this needs to happen after we remove all the keys, since RowCountChanged() will call our GetRowCount()
   if (mTree) 
     mTree->RowCountChanged(0, -oldSize);