* srpc: Implement part of VBlank_Handler
And call it on RPC message for lack of better ways
* ssound: Fix distance calculation
avoids negative array index
* srpc: fix sound id assignment
* srpc: bail out on missing sound id
* ssound: Fixes for angle and volume calculation
* srpc: Fix VAG filename stuff
* ssound: Fix CalculateAngle
* ssound: UpdateAutoVol fixes
* srpc: Fix up SET_PARAM command