Modified NoteDataWithScoring::GetActualRadarValues to use the time between the first and last hittable notes instead of the first and last seconds of the song because the song could start or end with mines or other unhittable notes.

src/NoteDataUtil.cpp

@@ -1066,8 +1066,8 @@ void NoteDataUtil::CalculateRadarValues( const NoteData &in, float fSongSeconds,
 					// Lifts have to be counted with taps for them to be added to max dp
 					// correctly. -Kyz
 				case TapNoteType_Lift:
-					// HoldTails and Attacks are counted by IsTap. -Kyz
-				case TapNoteType_HoldTail:
+					// HoldTails and Attacks are counted by IsTap.  But it doesn't
+					// make sense to count HoldTails as hittable notes. -Kyz
 				case TapNoteType_Attack:
 					++out[RadarCategory_Notes];
 					++state.num_notes_on_curr_row;