lxc_monitor: free @Preg on error

reuse label cleanup since free(NULL) is a no-op
Signed-off-by: Arjun Sreedharan <arjun024@gmail.com>
Acked-by: Serge E. Hallyn <serge.hallyn@ubuntu.com>

src/lxc/lxc_monitor.c

@@ -150,7 +150,7 @@ int main(int argc, char *argv[])
 	if (!fds) {
 		SYSERROR("out of memory");
 		rc_main = -1;
-		goto error;
+		goto cleanup;
 	}
 
 	nfds = my_args.lxcpath_cnt;