[paging] Stop the timer when the paging was successful

diff --git a/src/paging.c b/src/paging.c
index 4b45ef8..daa8c06 100644
--- a/src/paging.c
+++ b/src/paging.c
@@ -76,6 +76,7 @@
 			paging_bts->last_request = NULL;
 	}
 
+	del_timer(&to_be_deleted->T3113);
 	llist_del(&to_be_deleted->entry);
 	subscr_put(to_be_deleted->subscr);
 	free(to_be_deleted);