New `TYPEOF' macro.

This helps suppress signedness warnings, avoiding issues with
implicit conversion changes.

* include/config/ftconfig.h, builds/unix/ftconfig.in,
builds/vms/ftconfig.h (TYPEOF): Define.

* include/internal/ftobjs.h (FT_PAD_FLOOR, FT_PIX_FLOOR),
src/autofit/afwarp.h (AF_WARPER_FLOOR): Use it.
6 files changed