JosJuice c7e747d775 DiscIO: Improve IVolume::Read32 error handling ...

Callers can now check whether reads fail, either by checking the return
value or by setting the buffer to a known bad value and seeing if it stays
untouched. I've added error checks to FileSystemGCWii and Boot_BS2Emu,
but not to Boot since it doesn't check any of its other reads either.

2015-12-14 09:38:21 +01:00

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