describe: match pattern for lightweight tags too

The <pattern> given "git describe --match" was used only to filter tag
objects, and not to filter lightweight tags.  This fixes it.

[jc: made the log to clarify this is a bugfix, not an enhancement, with
additional test]

Signed-off-by: Michael Dressel <MichaelTiloDressel@t-online.de>
Acked-by: Shawn O. Pearce <spearce@spearce.org>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
diff --git a/builtin-describe.c b/builtin-describe.c
index df554b3..3da99c1 100644
--- a/builtin-describe.c
+++ b/builtin-describe.c
@@ -80,12 +80,13 @@
 	 * Otherwise only annotated tags are used.
 	 */
 	if (might_be_tag) {
-		if (is_tag) {
+		if (is_tag)
 			prio = 2;
-			if (pattern && fnmatch(pattern, path + 10, 0))
-				prio = 0;
-		} else
+		else
 			prio = 1;
+
+		if (pattern && fnmatch(pattern, path + 10, 0))
+			prio = 0;
 	}
 	else
 		prio = 0;