Mapster32: Helper feature -- pressing SHIFT on a 2-sided wall makes the PGUP/PGDN etc. commands operate on the sector at the other end of the wall; replaced searchstat numbers by #defined names and eliminated the worst cases of code duplication in astub.c
git-svn-id: https://svn.eduke32.com/eduke32@1598 1a8010ca-5511-0410-912e-c29ae57300e0