coccinelle: make use of the "type" FREE_AND_NULL() rule

Apply the result of the just-added coccinelle rule. This manually
excludes a few occurrences, mostly things that resulted in many
FREE_AND_NULL() on one line, that'll be manually fixed in a subsequent
change.

Signed-off-by: Ævar Arnfjörð Bjarmason <avarab@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

1 files changed, 1 insertions, 2 deletions

diff --git a/grep.c b/grep.c
index d03d424e5c..11513ec06d 100644
--- a/grep.c
+++ b/grep.c
@@ -1778,8 +1778,7 @@ void grep_source_clear_data(struct grep_source *gs)
 	case GREP_SOURCE_FILE:
 	case GREP_SOURCE_SHA1:
 	case GREP_SOURCE_SUBMODULE:
-		free(gs->buf);
-		gs->buf = NULL;
+		FREE_AND_NULL(gs->buf);
 		gs->size = 0;
 		break;
 	case GREP_SOURCE_BUF: