* OPT: Rebirth of _SUBR_add, _SUBR_sub and _SUBR_mul in 'gbx_exec_loop.c'. * NEW: The code of these functions is now in a shared header named ' gbx_subr_common.h'. git-svn-id: svn://localhost/gambas/trunk@4764 867c0c6c-44f3-4631-809d-bfa615b0a4ec