elm/interface_scrollable: return immediately from setting region if no content

Summary:
this is a valid case and should be handled without erroring

@fix
Depends on D8997

Reviewers: cedric

Reviewed By: cedric

Subscribers: cedric, #reviewers, #committers

Tags: #efl

Differential Revision: https://phab.enlightenment.org/D8998

src/lib/elementary/elm_interface_scrollable.c

@@ -1964,6 +1964,7 @@ _elm_scroll_wanted_region_set(Evas_Object *obj)
      return;
 
    sid->content_info.resized = EINA_FALSE;
+   if (!sid->pan_obj) return;
 
    /* Flip to RTL cords only if init in RTL mode */
    if (sid->is_mirrored)