Loading savestates break PSG channels

[getCursorsExe]

Savestate implementation does not capture the state of PSG channels, causing minor audio glitches after loading a savestate.
This relates to #496 but that issue only occured due to PSG and FIFO channels desyncing on state load.

[endrift]

This is categorically false. It's possible that some state isn't captured properly, but it absolutely does capture the state. Please give me an example of a game and scene in the game where I can actually reproduce this glitching.

[endrift]

Next time please file a real bug report, not a nonsensical analysis of a poorly described bug with no real information. I managed to fix this based on TASEmulators/BizHawk#2749, which is not a bug report you filed, nor contributed to at all. This bug report alone was useless.