From fcf3aed924b5efd0f44455440a7b180f5ee62ed7 Mon Sep 17 00:00:00 2001
From: stephena <stephena@8b62c5a3-ac7e-4cc8-8f21-d9a121418aba>
Date: Thu, 5 Jan 2012 21:30:35 +0000
Subject: [PATCH] Fixed crash in TIA zoom in the debugger, thanks to report
 from SvOlli of AtariAge.

git-svn-id: svn://svn.code.sf.net/p/stella/code/trunk@2335 8b62c5a3-ac7e-4cc8-8f21-d9a121418aba
---
 src/debugger/gui/TiaZoomWidget.cxx | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/src/debugger/gui/TiaZoomWidget.cxx b/src/debugger/gui/TiaZoomWidget.cxx
index 533a2d8aa..39fb16028 100644
--- a/src/debugger/gui/TiaZoomWidget.cxx
+++ b/src/debugger/gui/TiaZoomWidget.cxx
@@ -124,8 +124,8 @@ void TiaZoomWidget::recalc()
 
   // Only redraw when necessary
   int oldXoff = myXoff, oldYoff = myYoff;
-  myXoff = myXCenter - (myNumCols >> 1);
-  myYoff = myYCenter - (myNumRows >> 1);
+  myXoff = BSPF_max(0, myXCenter - (myNumCols >> 1));
+  myYoff = BSPF_max(0, myYCenter - (myNumRows >> 1));
   if(oldXoff != myXoff || oldYoff != myYoff)
   {
     setDirty(); draw();