* Rename the vague `Value` to `Fill`. * FillLen is at most 8. Making the field smaller to facilitate encoding MCAlignFragment as a MCFragment union member. * Replace an unreachable report_fatal_error with assert.
* Rename the vague `Value` to `Fill`. * FillLen is at most 8. Making the field smaller to facilitate encoding MCAlignFragment as a MCFragment union member. * Replace an unreachable report_fatal_error with assert.