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, 2 insertions, 4 deletions

diff --git a/attr.c b/attr.c
index 6e4b247..3745499 100644
--- a/attr.c
+++ b/attr.c
@@ -639,13 +639,11 @@ void attr_check_reset(struct attr_check *check)
 
 void attr_check_clear(struct attr_check *check)
 {
-	free(check->items);
-	check->items = NULL;
+	FREE_AND_NULL(check->items);
 	check->alloc = 0;
 	check->nr = 0;
 
-	free(check->all_attrs);
-	check->all_attrs = NULL;
+	FREE_AND_NULL(check->all_attrs);
 	check->all_attrs_nr = 0;
 
 	drop_attr_stack(&check->stack);