fix creating special folders on imap servers with personal namespace set and online dir not sent, 213570 sr=mscott

mailnews/imap/src/nsImapIncomingServer.cpp

@@ -3828,7 +3828,9 @@ nsImapIncomingServer::GetMsgFolderFromURI(nsIMsgFolder *aFolderResource, const c
       nsCOMPtr <nsIMsgFolder> folderResource;
       folderResource = do_QueryInterface(resource, &rv);
       NS_ENSURE_SUCCESS(rv,rv);
+      msgFolder = folderResource;
     }
+    else
       msgFolder = aFolderResource;
   }