Removed Lua's access to subsector/linedef validcounts and camera...

Removed Lua's access to subsector/linedef validcounts and camera viewheight/startangle, since they are all useless for Lua purposes

git-svn-id: https://code.orospakr.ca/svn/srb2/trunk@9040 6de4a73c-47e2-0310-b8c1-93d6ecd3f8cd