files: Don't call for run_unix_connections if there error happened earlier

It doesn't make sense to try to connect sockets if error
happened previously.

Signed-off-by: Cyrill Gorcunov <gorcunov@openvz.org>
Signed-off-by: Pavel Emelyanov <xemul@parallels.com>

files.c

@@ -477,7 +477,10 @@ int prepare_fds(int pid)
 
 	close(fdinfo_fd);
 
-	return run_unix_connections();
+	if (!ret)
+		ret = run_unix_connections();
+
+	return ret;
 }
 
 int prepare_fs(int pid)