MSYS: Fixing the build
Merge branch 'master' of skyjake.fi:doomsday/engine
MSYS|libcore|Legacy: Fixed warnings about char subscripts
World|Scripting: Update mobj visAngle together with angle
World|Map: Set mobj's map spot number at creation
World|Scripts: Added Thing.mapSpotNum() for querying source map spot
World|Map: Set mobj's map spot number at creation
Heretic|Hexen: Fixed updating visAngle of immobile things