OPL2Play DRO fix
OPL2Play DRO fix

This fixes a bug in OPL2Play where DRO file delays were 1ms too short,
causing some delays to be skipped completely and songs to be broken.

This fixes #40

DhrBaksteen/ArduinoOPL2,DhrBaksteen/ArduinoOPL2,DhrBaksteen/ArduinoOPL2