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, 1 insertions, 0 deletions

diff --git a/lib/libalpm/delta.c b/lib/libalpm/delta.c
index a43269d0..5ea20692 100644
--- a/lib/libalpm/delta.c
+++ b/lib/libalpm/delta.c
@@ -335,6 +335,7 @@ error:
 
 void _alpm_delta_free(alpm_delta_t *delta)
 {
+	ASSERT(delta != NULL, return);
 	FREE(delta->delta);
 	FREE(delta->delta_md5);
 	FREE(delta->from);