* harbour/include/hbapi.h
* harbour/src/rtl/hbrandom.c
added new C functions which fills memory block with random values:
void hb_random_block( void * data, HB_SIZE len )
this function should be used with "good enough" random generator
so in the future it may be changed to use internally sth different
then rand().
* harbour/src/vm/thread.c
* pacified minor warning