log: correctly identify mergetag signature verification status

A wrong '}' made our code record the results of mergetag signature
verification incorrectly.

Fix it.

Signed-off-by: Michael J Gruber <git@drmicha.warpmail.net>
Helped-by: Jeff King <peff@peff.net>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

log-tree.c

@@ -446,16 +446,17 @@ static void show_one_mergetag(struct rev_info *opt,
 
 	payload_size = parse_signature(extra->value, extra->len);
 	status = -1;
-	if (extra->len > payload_size)
-		if (verify_signed_buffer(extra->value, payload_size,
-					 extra->value + payload_size,
-					 extra->len - payload_size,
-					 &verify_message, NULL)) {
-			if (verify_message.len <= gpg_message_offset)
-				strbuf_addstr(&verify_message, "No signature\n");
-			else
-				status = 0;
-		}
+	if (extra->len > payload_size) {
+		/* could have a good signature */
+		if (!verify_signed_buffer(extra->value, payload_size,
+					  extra->value + payload_size,
+					  extra->len - payload_size,
+					  &verify_message, NULL))
+			status = 0; /* good */
+		else if (verify_message.len <= gpg_message_offset)
+			strbuf_addstr(&verify_message, "No signature\n");
+		/* otherwise we couldn't verify, which is shown as bad */
+	}
 
 	show_sig_lines(opt, status, verify_message.buf);
 	strbuf_release(&verify_message);