From 83df32e6598ffada869dea542df42b83b534fc8d Mon Sep 17 00:00:00 2001
From: Ingo <heckflosse@i-weyrich.de>
Date: Sat, 19 Apr 2014 22:53:04 +0200
Subject: [PATCH] RT crashes when undo crop action via history, Issue 1969

---
 rtgui/resize.cc | 1 +
 1 file changed, 1 insertion(+)

diff --git a/rtgui/resize.cc b/rtgui/resize.cc
index 58ea74900..c4b22dea5 100644
--- a/rtgui/resize.cc
+++ b/rtgui/resize.cc
@@ -351,6 +351,7 @@ void Resize::setDimensions () {
     	refw = maxw;
     	refh = maxh;
     }
+	GThreadLock lock;
     w->set_range (32, 4*refw);
     h->set_range (32, 4*refh);