[PATCH] Paper bag fix git-describe on packed tags

["Shawn O. Pearce" <spearce@spearce.org>]

In 212945d ("Teach git-describe to verify annotated tag names")
we tried to access a possibly unparsed tag structure.  We must
make sure it was parsed before we try to read its tag name.

Signed-off-by: Shawn O. Pearce <spearce@spearce.org>
---

 As 212945d is already in master this probably should be
 fast-tracked there.  Whoops.  :-)

 builtin-describe.c |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)

diff --git a/builtin-describe.c b/builtin-describe.c
index 2f1e7ba..d4204ee 100644
--- a/builtin-describe.c
+++ b/builtin-describe.c
@@ -156,7 +156,7 @@ static void display_name(struct commit_name *n)
 {
 	if (n->prio == 2 && !n->tag) {
 		n->tag = lookup_tag(n->sha1);
-		if (!n->tag || !n->tag->tag)
+		if (!n->tag || parse_tag(n->tag) || !n->tag->tag)
 			die("annotated tag %s not available", n->path);
 		if (strcmp(n->tag->tag, n->path))
 			warning("tag '%s' is really '%s' here", n->tag->tag, n->path);
-- 
1.5.4.3.509.gf785