Quiet some warnings. (vc8 certainly bitches alot more than vc6 did)

stepmania/src/NoteData.cpp

@@ -279,7 +279,7 @@ void NoteData::SetTapAttackNote( int track, int row, Attack attack )
 				TapNote::attack, 
 				TapNote::original, 
 				true,
-				i, 
+				(uint8_t)i, 
 				false,
 				0 );
 			SetTapNote( track, row, tn );

stepmania/src/PercentageDisplay.cpp

@@ -93,7 +93,7 @@ void PercentageDisplay::Refresh()
 		{		
 			// TRICKY: printf will round, but we want to truncate.  Otherwise, we may display a percent
 			// score that's too high and doesn't match up with the calculated grade.
-			float fTruncInterval = powf(0.1f,PERCENT_TOTAL_SIZE);
+			float fTruncInterval = powf(0.1f, (float) PERCENT_TOTAL_SIZE);
 			fPercentDancePoints = ftruncf( fPercentDancePoints, fTruncInterval );
 			
 			sNumToDisplay = ssprintf( "%*.*f%%", PERCENT_TOTAL_SIZE, PERCENT_DECIMAL_PLACES, fPercentDancePoints*100 );