libalpm/db.c : allow unregistering db for interrupted transaction.

This prevents alpm_release to loop infinitely in case of
an interrupted transaction, where the database wasn't
unregistered.
alpm_release should probably also be fixed, as it can
still loop if db_unregister fails for another reason.

Signed-off-by: Chantry Xavier <shiningxc@gmail.com>

1 files changed, 2 insertions, 1 deletions

diff --git a/lib/libalpm/db.c b/lib/libalpm/db.c
index cc489396..306d0b96 100644
--- a/lib/libalpm/db.c
+++ b/lib/libalpm/db.c
@@ -84,7 +84,8 @@ int SYMEXPORT alpm_db_unregister(pmdb_t *db)
 	ASSERT(handle != NULL, RET_ERR(PM_ERR_HANDLE_NULL, -1));
 	ASSERT(db != NULL, RET_ERR(PM_ERR_WRONG_ARGS, -1));
 	/* Do not unregister a database if a transaction is on-going */
-	ASSERT(handle->trans == NULL, RET_ERR(PM_ERR_TRANS_NOT_NULL, -1));
+	ASSERT(handle->trans == NULL || handle->trans->state == STATE_INTERRUPTED, 
+			RET_ERR(PM_ERR_TRANS_NOT_NULL, -1));
 
 	if(db == handle->db_local) {
 		handle->db_local = NULL;