make inline is_null_sha1 global

Replace sha1 comparisons to null_sha1 with a global inline (which previously an
unused static inline in builtin-apply.c)

[jc: with a fix from Jonas Fonseca.]

Signed-off-by: David Rientjes <rientjes@google.com>
Signed-off-by: Junio C Hamano <junkio@cox.net>

1 files changed, 1 insertions, 1 deletions

diff --git a/diff.c b/diff.c
index 2327e6065..6a8c0c9c0 100644
--- a/diff.c
+++ b/diff.c
@@ -1102,7 +1102,7 @@ void fill_filespec(struct diff_filespec *spec, const unsigned char *sha1,
 	if (mode) {
 		spec->mode = canon_mode(mode);
 		memcpy(spec->sha1, sha1, 20);
-		spec->sha1_valid = !!memcmp(sha1, null_sha1, 20);
+		spec->sha1_valid = !is_null_sha1(sha1);
 	}
 }