sceMpeg and sceAudiocodec only cleared their context maps on shutdown, while
sceMpegbase and sceVideocodec clear theirs on init. Both maps are keyed on an
address the game chooses, and getMpegCtx reads its key straight out of game
memory, so anything left behind can be handed to the next game we run in the
same session. Clear them on init as well. sceVideocodec's init cleared its map
without deleting the decoders in it; use ClearContexts for that.
Headless never loads a config file, so every g_Config field it doesn't set
keeps the zero-initialized value rather than the ConfigSetting default.
bFuncReplacements is one of those, so headless was the only build running games
without function replacements - which is why a crash in Jak and Daxter's
memcpy_jak wouldn't reproduce there.
Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>
