libmsc: Set trans->subscr = NULL after we release it
This is a cosmetic change and should happen to find use after free
of the subscriber.
diff --git a/openbsc/src/libmsc/transaction.c b/openbsc/src/libmsc/transaction.c
index bcfb6af..c144196 100644
--- a/openbsc/src/libmsc/transaction.c
+++ b/openbsc/src/libmsc/transaction.c
@@ -103,8 +103,10 @@
trans->paging_request = NULL;
}
- if (trans->subscr)
+ if (trans->subscr) {
subscr_put(trans->subscr);
+ trans->subscr = NULL;
+ }
llist_del(&trans->entry);