fix a few warnings reported by clang

- remove unused variables
- some more sanity checks
- safer printf

Signed-off-by: Xavier Chantry <shiningxc@gmail.com>
Signed-off-by: Dan McGee <dan@archlinux.org>

1 files changed, 1 insertions, 1 deletions

diff --git a/lib/libalpm/conflict.c b/lib/libalpm/conflict.c
index e934c01e..85db83ba 100644
--- a/lib/libalpm/conflict.c
+++ b/lib/libalpm/conflict.c
@@ -408,7 +408,7 @@ alpm_list_t *_alpm_db_find_fileconflicts(pmdb_t *db, pmtrans_t *trans,
 
 	ALPM_LOG_FUNC;
 
-	if(db == NULL || upgrade == NULL) {
+	if(db == NULL || upgrade == NULL || trans == NULL) {
 		return(NULL);
 	}