. Removed NTSC_VideoVbl(), since it's not accurate during full-speed. (Nothing was using it)
. Renamed VideoGetVbl() to VideoGetVblBar()
. Correctly pass Vbl (not VblBar) to Mouse's SetVBlank()
Fixed JoyUpdateButtonLatch() to debounce in 5mecs instead of 5secs!
SpkrToggle() was using redundant global ('cyclenum') when using the PC speaker.
. I reworked the code (as it looked out-of-date),
but probably better to just remove all the PC speaker support.
