message: If no delete filename is specified, don't print false error
diff: @@ -557,7 +557,7 @@ void logfile_close(LogFileHandle *logHandle, const char *deleteFilename)
  return;
  }
  }
  - else
  + else if(err)
  {
  RDCWARN("Couldn't release shared lock to '%s': %d", deleteFilename, (int)errno);
  // nothing to do, we won't try again, just exit. The log might lie around, but that's
  