* harbour/include/hbclass.ch
* harbour/source/vm/classes.c
* harbour/source/rtl/tobject.prg
* harbour/source/rtl/tclass.prg
! fixed race condition when class function is called 1-st time
and new class is created. It was possible that more then one
thread execute this function simultaneously and two classes
identical classes but with different handles were created
and registered in HVM
* harbour/contrib/xhb/xhbcomp.prg
* updated hack with optional inheritance for new class code
b3ee472fee