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, 5 insertions, 10 deletions

diff --git a/gpg-interface.c b/gpg-interface.c
index 8ab32df457..d936f3a32f 100644
--- a/gpg-interface.c
+++ b/gpg-interface.c
@@ -14,16 +14,11 @@ static const char *gpg_program = "gpg";
 
 void signature_check_clear(struct signature_check *sigc)
 {
-	free(sigc->payload);
-	free(sigc->gpg_output);
-	free(sigc->gpg_status);
-	free(sigc->signer);
-	free(sigc->key);
-	sigc->payload = NULL;
-	sigc->gpg_output = NULL;
-	sigc->gpg_status = NULL;
-	sigc->signer = NULL;
-	sigc->key = NULL;
+	FREE_AND_NULL(sigc->payload);
+	FREE_AND_NULL(sigc->gpg_output);
+	FREE_AND_NULL(sigc->gpg_status);
+	FREE_AND_NULL(sigc->signer);
+	FREE_AND_NULL(sigc->key);
 }
 
 static struct {