From d1426069756d5ef630a6a5e36f1f51c24ce6c1e5 Mon Sep 17 00:00:00 2001
From: Krisjanis Rijnieks <krisjanis.rijnieks@gmail.com>
Date: Thu, 15 Sep 2016 11:40:44 +0300
Subject: [PATCH] Fix crash because of ScaleWidget::update() on undo

---
 src/Gui/Widgets/ScaleWidget.cpp | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/src/Gui/Widgets/ScaleWidget.cpp b/src/Gui/Widgets/ScaleWidget.cpp
index b461090..b07b25e 100644
--- a/src/Gui/Widgets/ScaleWidget.cpp
+++ b/src/Gui/Widgets/ScaleWidget.cpp
@@ -24,6 +24,10 @@ void ScaleWidget::update(){
 		return;
 	}
 	
+	if(_surfaceManager->getSelectedSurface() == 0){
+		return;
+	}
+	
 	if(_selectedSurface != _surfaceManager->getSelectedSurface()){
 		_selectedSurface = _surfaceManager->getSelectedSurface();
 		setRect(_surfaceManager->getSelectedSurface()->getBoundingBox());