When the aperture base equals to aperture limit, the old code treats the aperture as non-existent. It's not correct because it indicates a range starting with base and the length is 1. The new code corrects the comparing bug. Contributed-under: TianoCore Contribution Agreement 1.0 Signed-off-by: Ruiyu Ni <ruiyu.ni@intel.com> Cc: Jeff Fan <jeff.fan@intel.com> Reviewed-by: Laszlo Ersek <lersek@redhat.com>