- fixed: ChangeSpy didn't check if a player's camera's player pointer was valid before using it to get an index into the players table.
- commented out autoloading of .DEH lumps for maint branch.
- changed autoloading of *.deh lumps: it is now controlled by a CVAR with 3 options: never load *.deh lumps, load all of them or only load the last one. *.deh loading is disabled by default.