DIS: Api name typo (missing r).

DIS: Fixed two bugs in the size-only parsers that was introduced when changing the return from size to offset late in the refactoring. Added tests to make sure this doesn't break again so easily.

tstDisasm-1: use out own callback.

DISCPUSTATE -> DISSTATE (slow change).

DIS: Prefetch instruction bytes before starting to disassemble, inline all fetchers. Poison the state a bit in strict builds.

Moved DiasmTest (tstDiasm) to testcase and called it tstDiasm-1.