evas: do not unref if there is no clipper

check if there is a clipper set before accessing it. This fixes crashes
of the drm engine.

Author:     Marcel Hollerbach <marcel-hollerbach@t-online.de>
Change-Id: I0dd09b8b42975ebc0bf69f2656f341babbe35de8

diff --git a/src/lib/evas/canvas/evas_object_smart.c b/src/lib/evas/canvas/evas_object_smart.c
index 16a2e79..cb1a6cb 100644 (file)
--- a/src/lib/evas/canvas/evas_object_smart.c
+++ b/src/lib/evas/canvas/evas_object_smart.c
@@ -1022,9 +1022,10 @@ evas_object_smart_changed_get(Evas_Object *eo_obj)
      return EINA_FALSE;
 
    //b. Object clipper visibility
-   if (!(obj->prev->clipper->cur->visible && obj->cur->clipper->cur->visible) ||
+   if ((obj->prev->clipper && obj->cur->clipper) &&
+       (!(obj->prev->clipper->cur->visible && obj->cur->clipper->cur->visible) ||
        ((obj->prev->clipper->cur->color.a == 0) &&
-        (obj->prev->clipper->prev->color.a == 0)))
+        (obj->prev->clipper->prev->color.a == 0))))
      return EINA_FALSE;
 
    if (!obj->clip.clipees)