Fix roll + autoplay bug under specific condition: roll starts on the same row as a freeze (roll would not be updated previously)

stepmania/src/Player.cpp

@@ -714,7 +714,18 @@ void Player::Update( float fDeltaTime )
 			// TODO: Make the CPU miss sometimes.
 			int iHeadRow;
 			if( !m_NoteData.IsHoldNoteAtRow(iTrack, iSongRow, &iHeadRow) )
-				continue;
+			{
+				/* Mike:
+				 * Because IsHoldNoteAtRow() returns false if iSongRow == iHeadRow, double check the
+				 * next row to be absolutely sure that we're not in a roll.
+				 * Necessary in the event that we have a freeze occur on the same row as a roll start,
+				 * otherwise we report that there is no roll in that freeze and thus it doesn't get
+				 * updated. */
+				if( !m_NoteData.IsHoldNoteAtRow(iTrack, (iSongRow+1), &iHeadRow) )
+					continue;
+				else
+					iHeadRow = iSongRow;
+			}
 
 			const TapNote &tn = m_NoteData.GetTapNote( iTrack, iHeadRow );
 			if( tn.type != TapNote::hold_head || tn.subType != TapNote::hold_head_roll )