gmod_src: Detect if the custom filesystem wasn't loaded and ..

[garry]

[B]Revision 845[/B]
[INDENT]Detect if the custom filesystem wasn't loaded and error out, before we try to use it![/INDENT] [B]Changed Files:[/B]
[LIST]
[*]trunk/src_garrysmod/filesystem/filesystem_steam.cpp
[*]trunk/src_garrysmod/game/client/cdll_client_int.cpp
[*]trunk/src_garrysmod/game/server/gameinterface.cpp
[*]trunk/src_garrysmod/public/filesystem.h
[/LIST]

Committed By [B]Garry Newman[/B]