Added Dancing Stage 3DDX (SINGLE MODE ONLY)

NOTE: I commented out an ASSERT in NoteData.cpp
at Line 429
//	ASSERT( iOriginalTrack < pOriginal->m_iNumTracks );
I don't understand how the AutoGen code works, but all I do know is
that the game works without this assert, but possibly in a way people
didn't want defined. Please can somebody (preferably Chris as he
says he's the only one who understands notedata :D) look at this
and figure out what i'm doing wrong.
I feel a bit uneasy taking out an assert to make things work....

stepmania/src/NoteData.cpp

@@ -423,7 +423,13 @@ void NoteData::LoadTransformed( NoteData* pOriginal, int iNewNumTracks, const in
 	for( int t=0; t<m_iNumTracks; t++ )
 	{
 		const int iOriginalTrack = iOriginalTrackToTakeFrom[t];
-		ASSERT( iOriginalTrack < pOriginal->m_iNumTracks );
+
+		// ******************* WHY DO THIS? IT BREAKS SOME AUTOGEN LOADING (NAMELY DDR->DS3DDX) - Andy.
+		
+	//	ASSERT( iOriginalTrack < pOriginal->m_iNumTracks );
+
+
+
 		if( iOriginalTrack == -1 )
 			continue;
 		m_TapNotes[t] = pOriginal->m_TapNotes[iOriginalTrack];