* harbour.spec
* include/hbver.h
* updated to set version 0.46.2
* include/hbapi.h
* source/vm/garbage.c
+ added possibility to register a sweep function that will scan
memory block allocated with hb_gcAlloc
* source/compiler/harbour.c
* source/compiler/harbour.y
* fixed 'unreachable code' warning in IF/ELSEIF
* fixed 'variable unused' warnings when -w3 switvh was used