Alpm, check for NULL in free-functions

Also, use FREE() instead of free() in _alpm_backup_free()
to set the pointers to NULL.

Signed-off-by: Rikard Falkeborn <rikard.falkeborn@gmail.com>
Signed-off-by: Allan McRae <allan@archlinux.org>

1 files changed, 4 insertions, 3 deletions

diff --git a/lib/libalpm/backup.c b/lib/libalpm/backup.c
index 5ccec036..3d1d6de7 100644
--- a/lib/libalpm/backup.c
+++ b/lib/libalpm/backup.c
@@ -76,9 +76,10 @@ alpm_backup_t *_alpm_needbackup(const char *file, alpm_pkg_t *pkg)
 
 void _alpm_backup_free(alpm_backup_t *backup)
 {
-	free(backup->name);
-	free(backup->hash);
-	free(backup);
+	ASSERT(backup != NULL, return);
+	FREE(backup->name);
+	FREE(backup->hash);
+	FREE(backup);
 }
 
 alpm_backup_t *_alpm_backup_dup(const alpm_backup_t *backup)