diff.c cleanup

Removes conditional return.

Signed-off-by: David Rientjes <rientjes@google.com>
Signed-off-by: Junio C Hamano <junkio@cox.net>
diff --git a/diff.c b/diff.c
index 8861b85..2327e60 100644
--- a/diff.c
+++ b/diff.c
@@ -904,9 +904,7 @@
 	long sz = mf->size;
 	if (FIRST_FEW_BYTES < sz)
 		sz = FIRST_FEW_BYTES;
-	if (memchr(mf->ptr, 0, sz))
-		return 1;
-	return 0;
+	return !!memchr(mf->ptr, 0, sz);
 }
 
 static void builtin_diff(const char *name_a,