Evas smart: Verify it's a smart object before returning the data.

SVN revision: 72034

legacy/evas/src/lib/canvas/evas_object_smart.c

@@ -96,6 +96,9 @@ evas_object_smart_data_get(const Evas_Object *obj)
    MAGIC_CHECK_END();
    o = (Evas_Object_Smart *)(obj->object_data);
    if (!o) return NULL;
+   MAGIC_CHECK(o, Evas_Object_Smart, MAGIC_OBJ_SMART);
+   return NULL;
+   MAGIC_CHECK_END();
    return o->data;
 }