Fixed bug in LO_AddLuminousMobjs which could lead to a seg fault when trying to process segs of a degenerate subsector. Added debug error message if a material for a given sprite frame can not be determined in LO_AddLuminous (trying to catch a non-windows bug).
Fixed bug in LO_AddLuminousMobjs which could lead to a seg fault when trying to process segs of a degenerate subsector.
Added debug error message if a material for a given sprite frame can not be determined in LO_AddLuminous (trying to catch a non-windows bug).