* harbour/include/hbdefs.h
* use extern "C" as default for HB_FUNC() declaration in C++ mode.
I know that this modification will interact with binary compatibility
but current state is worser because we were not binary compatible
between C and C++ mode. Now the problem should gone with some
reasonable for me cost. If your compiler uses the same ABI for C and
C++ mode then the backward binary compatibility problem can be resolved
by small tools which can strip C++ decoration from binary libraries or
maybe even linker has necessary switches to ignore them.
* harbour/include/hbexprb.c
* cleaned BCC warning
* harbour/source/rdd/nulsys/nulsys.c
+ added missing hb_rddGetAliasNumber(), thanks to Ron.
849810109e