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, 9 insertions, 18 deletions

diff --git a/transport-helper.c b/transport-helper.c
index 36408046eb..33cff38cc0 100644
--- a/transport-helper.c
+++ b/transport-helper.c
@@ -242,8 +242,7 @@ static int disconnect_helper(struct transport *transport)
 		close(data->helper->out);
 		fclose(data->out);
 		res = finish_command(data->helper);
-		free(data->helper);
-		data->helper = NULL;
+		FREE_AND_NULL(data->helper);
 	}
 	return res;
 }
@@ -711,43 +710,35 @@ static int push_update_ref_status(struct strbuf *buf,
 
 		if (!strcmp(msg, "no match")) {
 			status = REF_STATUS_NONE;
-			free(msg);
-			msg = NULL;
+			FREE_AND_NULL(msg);
 		}
 		else if (!strcmp(msg, "up to date")) {
 			status = REF_STATUS_UPTODATE;
-			free(msg);
-			msg = NULL;
+			FREE_AND_NULL(msg);
 		}
 		else if (!strcmp(msg, "non-fast forward")) {
 			status = REF_STATUS_REJECT_NONFASTFORWARD;
-			free(msg);
-			msg = NULL;
+			FREE_AND_NULL(msg);
 		}
 		else if (!strcmp(msg, "already exists")) {
 			status = REF_STATUS_REJECT_ALREADY_EXISTS;
-			free(msg);
-			msg = NULL;
+			FREE_AND_NULL(msg);
 		}
 		else if (!strcmp(msg, "fetch first")) {
 			status = REF_STATUS_REJECT_FETCH_FIRST;
-			free(msg);
-			msg = NULL;
+			FREE_AND_NULL(msg);
 		}
 		else if (!strcmp(msg, "needs force")) {
 			status = REF_STATUS_REJECT_NEEDS_FORCE;
-			free(msg);
-			msg = NULL;
+			FREE_AND_NULL(msg);
 		}
 		else if (!strcmp(msg, "stale info")) {
 			status = REF_STATUS_REJECT_STALE;
-			free(msg);
-			msg = NULL;
+			FREE_AND_NULL(msg);
 		}
 		else if (!strcmp(msg, "forced update")) {
 			forced = 1;
-			free(msg);
-			msg = NULL;
+			FREE_AND_NULL(msg);
 		}
 	}