From ba83c7ffebee150a6ee92ec09e0125013ed358ea Mon Sep 17 00:00:00 2001
From: Ton Roosendaal <ton@blender.org>
Date: Mon, 30 Jan 2006 11:30:37 +0000
Subject: [PATCH] The patch to pre-emptify the queues for 'clever numbuts'
 didn't check for non-existant windows, causing crash for example in Action
 window for shapes

---
 source/blender/src/toolbox.c | 8 ++++++--
 1 file changed, 6 insertions(+), 2 deletions(-)

diff --git a/source/blender/src/toolbox.c b/source/blender/src/toolbox.c
index 88ad8ae4e3e..5576b8b6ae6 100644
--- a/source/blender/src/toolbox.c
+++ b/source/blender/src/toolbox.c
@@ -1366,8 +1366,12 @@ int do_clever_numbuts(char *name, int tot, int winevent)
 	ScrArea *sa;
 	BWinEvent temp_bevt;
 	for (sa= G.curscreen->areabase.first; sa; sa= sa->next) {
-		while( bwin_qread( sa->win, &temp_bevt ) ) {}
-		while( bwin_qread( sa->headwin, &temp_bevt ) ) {}
+		if(sa->win) {
+			while( bwin_qread( sa->win, &temp_bevt ) ) {}
+		}
+		if(sa->headwin) {
+			while( bwin_qread( sa->headwin, &temp_bevt ) ) {}
+		}
 	}
 	/* Done clearing events */