Don't leave around mymbox.compacted when compaction fails (e.g. disk full),

otherwise kmail treats it as a real mailbox on the next restart

svn path=/branches/KDE_3_4_BRANCH/kdepim/; revision=405182

compactionjob.cpp

@@ -177,6 +177,7 @@ void MboxCompactionJob::done( int rc )
     str = i18n( "Error occurred while compacting \"%1\". Compaction aborted." ).arg( mSrcFolder->label() );
     kdDebug(5006) << "Error occurred while compacting " << mbox->location() << endl;
     kdDebug(5006) << "Compaction aborted." << endl;
+    QFile::remove( mTempName );
   }
   mErrorCode = rc;