From 5b577d54550d8b888f5b4daef48031e304cb4d8a Mon Sep 17 00:00:00 2001
From: Glenn Maynard <gmaynard@users.sourceforge.net>
Date: Wed, 30 Mar 2005 06:09:30 +0000
Subject: [PATCH] fix assertion failure

---
 stepmania/src/ScreenEdit.cpp | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/stepmania/src/ScreenEdit.cpp b/stepmania/src/ScreenEdit.cpp
index fde51d5c81..791d81455e 100644
--- a/stepmania/src/ScreenEdit.cpp
+++ b/stepmania/src/ScreenEdit.cpp
@@ -2158,6 +2158,8 @@ void ScreenEdit::HandleAreaMenuChoice( AreaMenuChoice c, const vector<int> &iAns
 					{
 						NoteData temp( m_Clipboard );
 						int iNumUsedTracks = NoteDataUtil::GetNumUsedTracks( temp );
+						if( iNumUsedTracks == 0 )
+							break;
 						temp.SetNumTracks( iNumUsedTracks );
 						NoteDataUtil::LoadTransformedSlidingWindow( temp, m_Clipboard, m_Clipboard.GetNumTracks() );
 						NoteDataUtil::FixImpossibleRows( m_Clipboard, GAMESTATE->m_pCurSteps[0]->m_StepsType );