gmod_game: Fixed spelling mistake in singleplayer.lua

Revision 424
Fixed spelling mistake in singleplayer.lua
version 100 dllsChanged Files:
[ul]
[li]trunk/bin/MenuSystem.dll[/li][li]trunk/bin/client.dll[/li][li]trunk/bin/lua_shared.dll[/li][li]trunk/bin/server.dll[/li][li]trunk/bin/toybox.dll[/li][li]trunk/lua/includes/extensions/string.lua[/li][li]trunk/lua/menu/singleplayer.lua[/li][/ul]
Committed By Garry Newman