mem gadget: respect the aspect ratio of the theme

I really don't like this implementation (taken from the clock gadget).
If you know a better way to get the aspect from an elm layout please let me know

src/modules/sysinfo/memusage/memusage.c

@@ -109,6 +109,37 @@ sysinfo_memusage_remove(Instance *inst)
      }
 }
 
+static void
+_memusage_eval_instance_aspect(Instance *inst)
+{
+   Evas_Coord w, h;
+   Evas_Coord sw = 0, sh = 0;
+   Evas_Object *owner, *ed;
+
+   owner = e_gadget_site_get(inst->o_main);
+   switch (e_gadget_site_orient_get(owner))
+     {
+        case E_GADGET_SITE_ORIENT_HORIZONTAL:
+           evas_object_geometry_get(owner, NULL, NULL, NULL, &sh);
+           sw = sh;
+           break;
+
+        case E_GADGET_SITE_ORIENT_VERTICAL:
+           evas_object_geometry_get(owner, NULL, NULL, &sw, NULL);
+           sh = sw;
+           break;
+
+        default:
+           sw = sh = 48;
+           break;
+     }
+
+   evas_object_resize(inst->cfg->memusage.o_gadget, sw, sh);
+   ed = elm_layout_edje_get(inst->cfg->memusage.o_gadget);
+   edje_object_parts_extends_calc(ed, NULL, NULL, &w, &h);
+   evas_object_size_hint_aspect_set(inst->o_main, EVAS_ASPECT_CONTROL_BOTH, w, h);
+}
+
 static void
 _memusage_created_cb(void *data, Evas_Object *obj, void *event_data EINA_UNUSED)
 {
@@ -122,6 +153,7 @@ _memusage_created_cb(void *data, Evas_Object *obj, void *event_data EINA_UNUSED)
    elm_box_pack_end(inst->o_main, inst->cfg->memusage.o_gadget);
    evas_object_show(inst->cfg->memusage.o_gadget);
    evas_object_smart_callback_del_full(obj, "gadget_created", _memusage_created_cb, data);
+   _memusage_eval_instance_aspect(inst);
    _memusage_config_updated(inst);
 }
 
@@ -176,7 +208,6 @@ memusage_create(Evas_Object *parent, int *id, E_Gadget_Site_Orient orient EINA_U
    *id = inst->cfg->id;
    inst->o_main = elm_box_add(parent);
    E_EXPAND(inst->o_main);
-   evas_object_size_hint_aspect_set(inst->o_main, EVAS_ASPECT_CONTROL_BOTH, 1, 1);
    evas_object_smart_callback_add(parent, "gadget_created", _memusage_created_cb, inst);
    evas_object_smart_callback_add(parent, "gadget_removed", _memusage_removed_cb, inst);
    evas_object_show(inst->o_main);