fix race condition

stepmania/src/RageTimer.cpp

@@ -33,12 +33,18 @@ static uint64_t g_iStartTime = ArchHooks::GetMicrosecondsSinceStart( true );
 
 static uint64_t GetTime( bool bAccurate )
 {
+	return ArchHooks::GetMicrosecondsSinceStart( true );
+
+	/* This isn't threadsafe, and locking it would undo any benefit of not
+	 * calling GetMicrosecondsSinceStart. */
+#if 0
 	// if !bAccurate, then don't call ArchHooks to find the current time.  Just return the 
 	// last calculated time.  GetMicrosecondsSinceStart is slow on some archs.
 	static uint64_t usecs = 0;
 	if( bAccurate )
 		usecs = ArchHooks::GetMicrosecondsSinceStart( true );
 	return usecs;
+#endif
 }
 
 float RageTimer::GetTimeSinceStart( bool bAccurate )