pretty_print_commit(): pass commit object instead of commit->buffer.

Signed-off-by: Junio C Hamano <junkio@cox.net>
diff --git a/show-branch.c b/show-branch.c
index d06e577..ffe7456 100644
--- a/show-branch.c
+++ b/show-branch.c
@@ -258,7 +258,7 @@
 	char pretty[256], *cp;
 	struct commit_name *name = commit->object.util;
 	if (commit->object.parsed)
-		pretty_print_commit(CMIT_FMT_ONELINE, commit->buffer, ~0,
+		pretty_print_commit(CMIT_FMT_ONELINE, commit, ~0,
 				    pretty, sizeof(pretty), 0);
 	else
 		strcpy(pretty, "(unavailable)");