From b0154190fbebe428cbcdc28e12ab0af836c55e34 Mon Sep 17 00:00:00 2001
From: Sergei Petrunia <psergey@askmonty.org>
Date: Thu, 17 Mar 2016 21:50:07 +0300
Subject: [PATCH] Remove the wrong check, win_spec->order_list may be empty but
 it is not NULL.

---
 sql/sql_window.cc | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/sql/sql_window.cc b/sql/sql_window.cc
index 0420ca33b06..7233828e3cc 100644
--- a/sql/sql_window.cc
+++ b/sql/sql_window.cc
@@ -135,7 +135,7 @@ setup_windows(THD *thd, Ref_ptr_array ref_pointer_array, TABLE_LIST *tables,
     if (win_spec->window_frame && 
         win_spec->window_frame->units == Window_frame::UNITS_RANGE)
     {
-      if (!win_spec->order_list || win_spec->order_list->elements != 1)
+      if (win_spec->order_list->elements != 1)
       {
         my_error(ER_RANGE_FRAME_NEEDS_SIMPLE_ORDERBY, MYF(0));
         DBUG_RETURN(1);