cmd_fetch_pack(): return early if finish_connect() fails

This simplifies the logic without changing the behavior.
Signed-off-by: NMichael Haggerty <mhagger@alum.mit.edu>
Signed-off-by: NJunio C Hamano <gitster@pobox.com>

builtin/fetch-pack.c

@@ -1018,10 +1018,10 @@ int cmd_fetch_pack(int argc, const char **argv, const char *prefix)
 	close(fd[0]);
 	close(fd[1]);
 	if (finish_connect(conn))
-		ref = NULL;
-	ret = !ref;
+		return 1;
 
-	if (!ret && sought.nr) {
+	ret = !ref;
+	if (ref && sought.nr) {
 		/* If the heads to pull were given, we should have
 		 * consumed all of them by matching the remote.
 		 * Otherwise, 'git fetch remote no-such-ref' would