live_edit: add return value

Summary: fix static analyzer warning

Reviewers: Hermet, Jaehyun_Cho

Reviewed By: Jaehyun_Cho

Differential Revision: https://phab.enlightenment.org/D4000

src/bin/live_edit.c

@@ -2290,7 +2290,7 @@ live_edit_init(Evas_Object *parent)
    if (!ld)
      {
         EINA_LOG_ERR(_("Faild to allocate Memory!"));
-        return;
+        return NULL;
      }
    g_ld = ld;