Fixed a compile-breaking error;

Added the ability to set each floppy drive to turbo speed which will make it opperate at an effective 8000 kbps @ 300 rpm, for those who want faster but less accurate floppy timings.

src/disc.c

@@ -195,6 +195,11 @@ double disc_byteperiod(int drive)
 
 	if (drives[drive].byteperiod)
 	{
+		if (fdd_get_turbo(drive))
+		{
+			return 1.0;
+		}
+
 		return drives[drive].byteperiod(drive);
 	}
 	else
@@ -213,7 +218,7 @@ double disc_real_period(int drive)
 	dusec = (double) TIMER_USEC;
 
 	/* This is a giant hack but until the timings become even more correct, this is needed to make floppies work right on that BIOS. */
-	if (romset == ROM_MRTHOR)
+	if ((romset == ROM_MRTHOR) && !fdd_get_turbo(drive))
 	{
 		return (ddbp * dusec) / 4.0;
 	}