-Remove viewangletox table.
-Use ZDoom 1.23b33 code for calculating xtoviewangle without viewangletox.

git-svn-id: http://odamex.net/svn/root/branches/rend32@4463 b0bcef46-2027-0410-bd56-ab726e9a1d04
-There's no need to memset the ylookup, columnofs and xtoviewangle arrays when changing the screen resolution.

git-svn-id: http://odamex.net/svn/root/branches/rend32@4464 b0bcef46-2027-0410-bd56-ab726e9a1d04