From fb4822d6c6d9a0e9bf76dd4d01c682b3acd5f54a Mon Sep 17 00:00:00 2001
From: Chris Danford <chrisdanford@users.sourceforge.net>
Date: Wed, 23 Mar 2005 03:36:30 +0000
Subject: [PATCH] fix backsp on empty string crashes

---
 stepmania/src/ScreenTextEntry.cpp | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/stepmania/src/ScreenTextEntry.cpp b/stepmania/src/ScreenTextEntry.cpp
index 8fd48a1c0e..f196ddd9d0 100644
--- a/stepmania/src/ScreenTextEntry.cpp
+++ b/stepmania/src/ScreenTextEntry.cpp
@@ -253,6 +253,11 @@ void ScreenTextEntry::AppendToAnswer( CString s )
 
 void ScreenTextEntry::BackspaceInAnswer()
 {
+	if( m_sAnswer.empty() )
+	{
+		SCREENMAN->PlayInvalidSound();
+		return;
+	}
 	m_sAnswer.erase( m_sAnswer.end()-1 );
 	m_sndBackspace.Play();
 	UpdateAnswerText();