Fix incorrect X/Y values in INSTANCE_ID_TABLE_INVALID BSOD
Fix incorrect X/Y values in INSTANCE_ID_TABLE_INVALID BSOD

This commit fixes a bug where the INSTANCE_ID_TABLE_INVALID BSOD was not
showing the correct 'instanceIdTable index' (in the X register) or
'table cell value' (Y register) if the first entry in the
instanceIdTable was invalid.

undisbeliever/untech-engine