Add sync in client-server loop

git-svn-id: http://qboxcode.org/svn/qb/trunk@1907 cba15fb0-1239-40c8-b417-11db7ca47a34

src/UserInterface.C

@@ -486,6 +486,7 @@ void UserInterface::processCmdsServer ( string inputfilename,
     }
 
     // wait before retrying
+    sync();
     usleep(200000);
 
   } // while !done