* harbour/src/vm/thread.c
+ added new function:
hb_criticalCode( <pMtx>, <bCode> | <@sFunc()> ) -> <xCodeResult>
it executes <bCode> or @sFunc() when <pMtx> is locked by this function.
! fixed hb_mutexQueueInfo() to not overwrite RTE subst value.
This function may only return .T. or generate RTE so the logical
return value is useless. I think that it should be removed and this
function should simply return NIL.
* updated syntax of PRG functions
6e54f3860e