partial fix for bug #195142

Canceling a move to trash permanently deletes mailbox
thanks to ajschult@eos.ncsu.edu for the patch.
r=sspitzer, sr=bienvenu, a=asa,sspitzer

mailnews/local/src/nsLocalMailFolder.cpp

@@ -2151,7 +2151,7 @@ nsMsgLocalMailFolder::CopyFolderLocal(nsIMsgFolder *srcFolder, PRBool isMoveFold
   nsCOMPtr<nsISupports> supports;
   rv = aEnumerator->First();
   nsresult copyStatus = NS_OK;
-  while (NS_SUCCEEDED(rv))
+  while (NS_SUCCEEDED(rv) && NS_SUCCEEDED(copyStatus))
   {
     rv = aEnumerator->CurrentItem(getter_AddRefs(supports));
     folder = do_QueryInterface(supports);