log: clarify comment about reflog cycles

diff --git a/blame.c b/blame.c
index 6d57ab9715665a8bc6a2ba02015342ad851b6d2f..91e26e93e8a23d0af63e1bc8a74e9f7690276ab4 100644 (file)
--- a/blame.c
+++ b/blame.c
@@ -314,8 +314,7 @@ static void fill_origin_blob(struct diff_options *opt,
 static void drop_origin_blob(struct blame_origin *o)
 {
        if (o->file.ptr) {
-               free(o->file.ptr);
-               o->file.ptr = NULL;
+               FREE_AND_NULL(o->file.ptr);
        }
 }