Use Sega Genesis' YM3438 clock rate

[nukeykt]

Hope this'll resolve LFO problem.

[Wohlstand]

I'll check how it will work

[Wohlstand]

Okay, you just killed three hares:

• sound now is much better on GME's emulator
• LFO trouble has gone from Nuked
• CPU overload crap also gone (however, only 3 parallel chips are can be emulated on my hardware without multi-threading support to run group of chips on different CPUs that I need to implement and add pthread as dependency)

Thanks!

P.S. After your clock frequency change I'll need to polish a bit my gm.wopn bank (with applying your clock strategy also to OPN2 Bank Editor too) because of quality regression of some instruments.