Update to ZDoom r1312:

- Fixed: The save percentage for Doom's green armor was slightly too low
  which caused roundoff errors that made it less than 1/3 effective.
- Added support for "RRGGBB" strings to V_GetColor.
- Fixed: Desaturation maps for the TEXTURES lump were calculated incorrectly.
- Changed GetSpriteIndex to cache the last used sprite name so that the code
  using this function doesn't have to do it itself.
- Moved some more code for the state parser into p_states.cpp.
- Fixed: TDeletingArray should not try to delete NULL pointers.
- Added binary (b) and hexadecimal (x) cast types for ACS's various print
  statements.
- Added ClassifyActor(tid) ACS builtin function. This takes a TID and returns
  a set of bits describing the actor. If TID is 0, it returns information
  about the activator. If there is more than one actor with the given TID,
  only the first one is considered. Currently defined bits are:
    ACTOR_NONE         No actors with this TID exist (only when TID is not 0).
    ACTOR_WORLD        Activator is the world (only when TID is 0).
    ACTOR_PLAYER       Actor is a player (includes bots and voodoo dolls).
    ACTOR_BOT          Actor is a bot.
    ACTOR_VOODOODOLL   Actor is a voodoo doll.
    ACTOR_MONSTER      Actor is a monster.
    ACTOR_ALIVE        Actor is alive (players/monsters only).
    ACTOR_DEAD         Actor is dead (players/monsters only).
    ACTOR_MISSILE      Actor is a missile.
    ACTOR_GENERIC      Actor exists, but no further information is available.
- Moved ExpandEnvVars() from d_main.cpp to cmdlib.cpp.
- AutoExec paths now support the same variable expansion as the search paths.
  Additionally, on Windows, the default autoexec path is now relative to
  $PROGDIR, rather than using a fixed path to the executable's current
  directory.
- All usable Autoload and AutoExec sections are now created at the top of
  the config file along with some brief explanatory notes so they are
  readily visible to anyone who wants to edit them.

git-svn-id: http://mancubus.net/svn/hosted/gzdoom/trunk@254 b0f79afe-0144-0410-b225-9a4edf0717df

src/cmdlib.h

@@ -55,4 +55,6 @@ int strbin (char *str);
 
 void CreatePath(const char * fn);
 
+FString ExpandEnvVars(const char *searchpathstring);
+
 #endif