From 9b9d8b5aa403ae33e277fa9a6f2b173d08aa748b Mon Sep 17 00:00:00 2001
From: Glenn Maynard <gmaynard@users.sourceforge.net>
Date: Tue, 20 Apr 2004 06:04:31 +0000
Subject: [PATCH] assert for negative updates; they should never happen (this
 is why backgrounds would turn black on negative song position updates--the
 background would enter hibernate for a while)

---
 stepmania/src/Actor.cpp | 1 +
 1 file changed, 1 insertion(+)

diff --git a/stepmania/src/Actor.cpp b/stepmania/src/Actor.cpp
index 471ba701d6..012150c48c 100644
--- a/stepmania/src/Actor.cpp
+++ b/stepmania/src/Actor.cpp
@@ -297,6 +297,7 @@ bool Actor::IsFirstUpdate()
 void Actor::Update( float fDeltaTime )
 {
 //	LOG->Trace( "Actor::Update( %f )", fDeltaTime );
+	ASSERT_M( fDeltaTime >= 0, ssprintf("%f",fDeltaTime) );
 
 	m_fHibernateSecondsLeft -= fDeltaTime;
 	m_fHibernateSecondsLeft = max( 0, m_fHibernateSecondsLeft );