parse/grammar: fix missing unref of looked up child

the target parameter of gst_child_proxy_lookup() is (transfer full)

Fixes: https://gitlab.freedesktop.org/gstreamer/gstreamer/-/issues/2560
Part-of: <https://gitlab.freedesktop.org/gstreamer/gstreamer/-/merge_requests/4624>

diff --git a/subprojects/gstreamer/gst/parse/grammar.y.in b/subprojects/gstreamer/gst/parse/grammar.y.in
index d1ed805..0794bd2 100644 (file)
--- a/subprojects/gstreamer/gst/parse/grammar.y.in
+++ b/subprojects/gstreamer/gst/parse/grammar.y.in
@@ -672,6 +672,8 @@ static GstElement * gst_parse_element_make (graph_t *graph, element_t *data) {
         g_object_set_property (target, pspec->name, &v);
         g_value_unset (&v);
       }
+
+      gst_object_unref (target);
     }
   }