config: Fix segfault

We can pass here NULL, win does not have a specific saved e_comp.
So we pass NULL to e_comp_get and get the current active one.

This fixes T1937.

src/modules/conf_display/e_int_config_desk.c

@@ -166,7 +166,7 @@ _basic_create(E_Config_Dialog *cfd, Evas *evas, E_Config_Dialog_Data *cfdata)
    Evas_Object *o, *of, *ol, *ob;
    E_Zone *zone;
 
-   zone = e_zone_current_get(e_comp_get(cfd->dia->win));
+   zone = e_zone_current_get(e_comp_get(NULL));
 
    o = e_widget_list_add(evas, 0, 0);