[PATCH v2] fast-export: Make sure we show actual ref names instead of "(null)"

[newren@gmail.com]

From: Elijah Newren <newren@gmail.com>

Under some cases (e.g. 'git fast-export --parents master -- COPYING' run
in git.git), the output included the lines
  reset (null)
  commit (null)
instead of
  reset refs/heads/master
  commit refs/heads/master
This simple change fixes that.

Signed-off-by: Elijah Newren <newren@gmail.com>
---
(No change to this patch since the first series.)
As noted above, run 'git fast-export --parents master -- COPYING' in
git.git to see this bug triggered.

 builtin-fast-export.c |    1 +
 1 files changed, 1 insertions(+), 0 deletions(-)

diff --git a/builtin-fast-export.c b/builtin-fast-export.c
index 891e2d4..9aa409b 100644
--- a/builtin-fast-export.c
+++ b/builtin-fast-export.c
@@ -531,6 +531,7 @@ int cmd_fast_export(int argc, const char **argv, const char *prefix)
 	get_tags_and_duplicates(&revs.pending, &extra_refs);
 
 	revs.topo_order = 1;
+	revs.show_source = 1;
 	if (prepare_revision_walk(&revs))
 		die("revision walk setup failed");
 	revs.diffopt.format_callback = show_filemodify;
-- 
1.6.0.6