Add support for Audio/Video Disable flags
Disabling Video works, and I also fixed a line that caused LAGFIX to infinite loop in gfx.c when skipping frames
Disabling Audio is not optimized, but it does stop a few buffer copies.
Add support for Hard Disable Audio, which shuts off audio DSP emulation, but keeps the SPC700 processor running.
Fix building for MSVC. Seems that I need to redefine strnicmp as _strnicmp, otherwise it will refuse to build on MSVC. So it's conditional to MSVC only.
strnicmpas_strnicmp, otherwise it will refuse to build on MSVC. So it's conditional to MSVC only.