Make integer wrap checks the same for mmap, munmap, msync, etc by factoring most of the checks into a macro.  OK otto@
Make integer wrap checks the same for mmap, munmap, msync, etc
by factoring most of the checks into a macro.  OK otto@

orumin/openbsd-efivars,orumin/openbsd-efivars,orumin/openbsd-efivars,orumin/openbsd-efivars