fix USB_GenerateFilename for 6 digit

byte USB_GenerateFilename(byte Channel, byte Sound, char* FileName) {
	if ((Sound >> 4) < 10) {
		*(FileName+2) = 48 + (Sound >> 4);}
	else {
		*(FileName+2) = 55 + (Sound >> 4);}
	if ((Sound & 15) < 10) {
		*(FileName+3) = 48 + (Sound & 15);}
	else {
		*(FileName+3) = 55 + (Sound & 15);}
	if (game_settings[USB_Debug] == 2) {								// display can be used for debug information
		if (Channel == 1) {
			if (SD.exists(FileName)) {											// sound file present?
				if (APC_settings[DisplayType] < 6) {					// Sys11 type display?  // fix matiou: "< 6" instead of "< 7"
					*(DisplayLower+2) = DispPattern2[2 * (FileName[2] - 32)]; // show the number of the sound to be played
					*(DisplayLower+3) = DispPattern2[2 * (FileName[2] - 32) + 1];
					*(DisplayLower+4) = DispPattern2[2 * (FileName[3] - 32)];
					*(DisplayLower+5) = DispPattern2[2 * (FileName[3] - 32) + 1];}
				else if (APC_settings[DisplayType] == 6) {		// Sys3-6 type display
          *(DisplayLower) = ConvertNumLower(Sound / 100,(byte) *(DisplayLower)); // fix matiou to handle hundreds
          *(DisplayLower+2) = ConvertNumLower(Sound % 100 / 10,(byte) *(DisplayLower+2));
          *(DisplayLower+4) = ConvertNumLower(Sound % 10,(byte) *(DisplayLower+4));
				}
				else {																				// Sys3 7 - 9 type display
					*(DisplayLower+2) = ConvertNumLower(Sound / 10,(byte) *(DisplayLower+2));
					*(DisplayLower+4) = ConvertNumLower(Sound % 10,(byte) *(DisplayLower+4));}}
			else {																					// sound file doesn't exist
				if (APC_settings[DisplayType] < 6) {					// Sys11 type display?  // fix matiou: "< 6" instead of "< 7"
					*(DisplayLower+12) = DispPattern2[2 * (FileName[2] - 32)]; // show the number of the missing sound
					*(DisplayLower+13) = DispPattern2[2 * (FileName[2] - 32) + 1];
					*(DisplayLower+14) = DispPattern2[2 * (FileName[3] - 32)];
					*(DisplayLower+15) = DispPattern2[2 * (FileName[3] - 32) + 1];}
				else if (APC_settings[DisplayType] == 6) {		// Sys3 - 6 type display
          *(DisplayLower+6) = ConvertNumLower(Sound / 100,(byte) *(DisplayLower+6)); // fix matiou to handle hundreds
          *(DisplayLower+8) = ConvertNumLower(Sound % 100 / 10,(byte) *(DisplayLower+8));
          *(DisplayLower+10) = ConvertNumLower(Sound % 10,(byte) *(DisplayLower+10));
				}
				else {																				// Sys3 7 - 9 type display
					*(DisplayLower+12) = ConvertNumLower(Sound / 10,(byte) *(DisplayLower+12));
					*(DisplayLower+14) = ConvertNumLower(Sound % 10,(byte) *(DisplayLower+14));}
				return(0);}}																	// indicate that file doesn't exist
		else {																						// channel 2 - Sys11 only
			if (SD.exists(FileName)) {
				*(DisplayLower+18) = DispPattern2[2 * (FileName[2] - 32)]; // show the number of the music to be played
				*(DisplayLower+19) = DispPattern2[2 * (FileName[2] - 32) + 1];
				*(DisplayLower+20) = DispPattern2[2 * (FileName[3] - 32)];
				*(DisplayLower+21) = DispPattern2[2 * (FileName[3] - 32) + 1];}
			else {
				*(DisplayLower+28) = DispPattern2[2 * (FileName[2] - 32)]; // show the number of the missing music
				*(DisplayLower+29) = DispPattern2[2 * (FileName[2] - 32) + 1];
				*(DisplayLower+30) = DispPattern2[2 * (FileName[3] - 32)];
				*(DisplayLower+31) = DispPattern2[2 * (FileName[3] - 32) + 1];
				return(0);}}}																	// indicate that file doesn't exist
	return(1);}																					// indicate that file does exist