When using a bad atrac ID, return proper errors.

Tested each func with invalid ids.
Return an error when no data set yet.

Specifically this happens if you sceAtracGetAtracID, but don't set any
data yet.  Games might check for it to load in data.
Adjust some atrac reporting/logging.
Report and return errors for bad atrac data.

The PSP returns errors for invalid data, so we should too.
Fix state value in atrac context with no buffer.

Unlikely games use this, but they could.
Initialize atrac context values per PSP tests.
Cap the buffer size in sceAtracSetDataAndGetID().

Not sure if this should be done in the others or not...
Merge pull request #4344 from unknownbrackets/atrac-minor

Improve basic error checking in sceAtrac