fix memleak of proxy_subscr_listentry

Patch-by: whytek
Related: OS#5854
Change-Id: Ic1ec4911fa5ae91cc75aa865c8201edd83af41ed
diff --git a/src/proxy.c b/src/proxy.c
index 1ae152c..152fce8 100644
--- a/src/proxy.c
+++ b/src/proxy.c
@@ -190,6 +190,7 @@
 int _proxy_subscr_del(struct proxy_subscr_listentry *e)
 {
 	llist_del(&e->entry);
+	talloc_free(e);
 	return 0;
 }