[PATCH] Fix amending of a commit with an empty message

[Alex Riesen <raa.lkml@gmail.com>]

This change probably does even more than that: it allows amending of
anything, even of a commit which does not change anything.

Signed-off-by: Alex Riesen <raa.lkml@gmail.com>
---
Alex Riesen, Thu, Feb 21, 2008 21:35:06 +0100:
> Junio C Hamano, Thu, Feb 21, 2008 21:23:10 +0100:
> > Alex Riesen <raa.lkml@gmail.com> writes:
> > >
> > > Well, it fails... In current master
> > 
> > Then please mark it with test_expect_failure.
> 
> That's because I expect it to be fixed (in the next mail)
> 

In this one. I am a bit unsure regarding the change (it looks a little
too strong), even though it passes the test suite.

 builtin-commit.c |    2 ++
 1 files changed, 2 insertions(+), 0 deletions(-)

diff --git a/builtin-commit.c b/builtin-commit.c
index 065e1f7..ab3fd7b 100644
--- a/builtin-commit.c
+++ b/builtin-commit.c
@@ -520,6 +520,8 @@ static int prepare_to_commit(const char *index_file, const char *prefix)
 
 		if (get_sha1(parent, sha1))
 			commitable = !!active_nr;
+		else if (amend)
+			commitable = 1;
 		else {
 			init_revisions(&rev, "");
 			rev.abbrev = 0;
-- 
1.5.4.2.204.g6d0ab