Implement RADAR_NUM_HANDS result.

Change hold note contents to rows (from beats).  This makes it
consistent with tap note data.  Row numbers are also generally
more precise, since they're integers, not floats.

stepmania/src/Player.cpp

@@ -238,6 +238,7 @@ void PlayerMinus::Update( float fDeltaTime )
 
 
 	const float fSongBeat = GAMESTATE->m_fSongBeat;
+	const int iSongRow = BeatToNoteRow( fSongBeat );
 
 	m_pNoteField->Update( fDeltaTime );
 
@@ -282,7 +283,7 @@ void PlayerMinus::Update( float fDeltaTime )
 		const HoldNote &hn = GetHoldNote(i);
 		HoldNoteScore hns = GetHoldNoteScore(i);
 		float fLife = GetHoldNoteLife(i);
-		int iHoldStartIndex = BeatToNoteRow(hn.fStartBeat);
+		int iHoldStartIndex = hn.iStartRow;
 
 		m_pNoteField->m_bIsHoldingHoldNote[i] = false;	// set host flag so NoteField can do intelligent drawing
 
@@ -297,7 +298,7 @@ void PlayerMinus::Update( float fDeltaTime )
 		const bool bSteppedOnTapNote = tns != TNS_NONE  &&  tns != TNS_MISS;	// did they step on the start of this hold?
 
 		// If the song beat is in the range of this hold:
-		if( hn.fStartBeat <= fSongBeat && fSongBeat <= hn.fEndBeat )
+		if( hn.iStartRow <= iSongRow && iSongRow <= hn.iEndRow )
 		{
 			bool bIsHoldingButton = INPUTMAPPER->IsButtonDown( GameI );
 			
@@ -316,7 +317,7 @@ void PlayerMinus::Update( float fDeltaTime )
 				// its HoldNote::fEndBeat.  Otherwise, when HoldNotes are converted to the 
 				// 4s representation, it disappears, which causes problems for the way we 
 				// store HoldNote life (by index of the hold).
-				m_pNoteField->GetHoldNote(i).fStartBeat = min( fSongBeat, m_pNoteField->GetHoldNote(i).fEndBeat	-NoteRowToBeat(1) );
+				m_pNoteField->GetHoldNote(i).iStartRow = min( iSongRow, m_pNoteField->GetHoldNote(i).iEndRow-1 );
 			}
 
 			if( bSteppedOnTapNote && bIsHoldingButton )
@@ -347,7 +348,7 @@ void PlayerMinus::Update( float fDeltaTime )
 			hns = HNS_NG;
 
 		// check for OK
-		if( fSongBeat >= hn.fEndBeat && bSteppedOnTapNote && fLife > 0 )	// if this HoldNote is in the past
+		if( iSongRow >= hn.iEndRow && bSteppedOnTapNote && fLife > 0 )	// if this HoldNote is in the past
 		{
 			fLife = 1;
 			hns = HNS_OK;