* contrib/hbwin/axcore.c
* Replaced duplicated constant with HB_SIZEOFARRAY() macro.
* utils/hbmk2/hbmk2.prg
+ C compiler autodetection will now make sure to skip compilers
where required Harbour core libraries aren't installed.
This autodetection is disabled when HB_LIB_INSTALL is set
manually and also when lib/<plat> dir is missing altogether,
assuming there is a single-compiler installation used in this
case (where such autodetection cannot work reliably).
When using -info option, a screen message is shown if
autodetected C compiler is skipped for above reason.
a0e07d3940