[gjs: 2/8] object: add reference to the property pspec we cache

[Philip Chimento <pchimento src gnome org>]

commit c9d04066b4fb08947c3412cd2b6d73291de4265c
Author: Marco Trevisan (Treviño) <mail 3v1n0 net>
Date:   Tue Oct 9 05:49:21 2018 +0200

    object: add reference to the property pspec we cache
    
    When caching the properties param specs we get them from the class object, which
    is currently owning them, however since we're caching them we should add a
    reference to them in order to keep the ownership and clean them up properly
    when the cache is destroyed
    
    Fixes GNOME/gjs#213

 gi/object.cpp | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)
---
diff --git a/gi/object.cpp b/gi/object.cpp
index eb5988d2..93fa06cf 100644
--- a/gi/object.cpp
+++ b/gi/object.cpp
@@ -287,7 +287,8 @@ GParamSpec* ObjectPrototype::find_param_spec_from_id(JSContext* cx,
 
     gname = gjs_hyphen_from_camel(js_prop_name);
     GObjectClass *gobj_class = G_OBJECT_CLASS(g_type_class_ref(m_gtype));
-    GjsAutoParam param_spec = g_object_class_find_property(gobj_class, gname);
+    GParamSpec* pspec = g_object_class_find_property(gobj_class, gname);
+    GjsAutoParam param_spec(pspec, GjsAutoParam::TakeOwnership());
     g_type_class_unref(gobj_class);
     g_free(gname);