Merge branch 'ab/free-and-null'

A common pattern to free a piece of memory and assign NULL to the
pointer that used to point at it has been replaced with a new
FREE_AND_NULL() macro.

* ab/free-and-null:
  *.[ch] refactoring: make use of the FREE_AND_NULL() macro
  coccinelle: make use of the "expression" FREE_AND_NULL() rule
  coccinelle: add a rule to make "expression" code use FREE_AND_NULL()
  coccinelle: make use of the "type" FREE_AND_NULL() rule
  coccinelle: add a rule to make "type" code use FREE_AND_NULL()
  git-compat-util: add a FREE_AND_NULL() wrapper around free(ptr); ptr = NULL

1 files changed, 1 insertions, 2 deletions

diff --git a/commit.c b/commit.c
index 99846d9bf4..cbfd689939 100644
--- a/commit.c
+++ b/commit.c
@@ -287,8 +287,7 @@ void free_commit_buffer(struct commit *commit)
 {
 	struct commit_buffer *v = buffer_slab_peek(&buffer_slab, commit);
 	if (v) {
-		free(v->buffer);
-		v->buffer = NULL;
+		FREE_AND_NULL(v->buffer);
 		v->size = 0;
 	}
 }