(svn r5946) -Add: merged the TGP branch to mainline. TGP adds:

  - New optional landscape generator (TerraGenesis Perlin)
  - Load heightmaps (either BMP or PNG)
  - Progress dialog while generating worlds (no longer a 'hanging' screen)
  - New dialogs for NewGame, Create Scenario and Play Heightmap
    - Easier to configure your landscape
    - More things to configure (tree-placer, ..)
  - Speedup of world generation
  - New console command 'restart': restart the map EXACTLY as it was when you
      first started it (needs a game made after or with this commit)
  - New console command 'getseed': get the seed of your map and share it with
      others (of course only works with generated maps)
  - Many new, world generation related, things
  - Many internal cleanups and rewrites
  Many tnx to those people who helped making this:
     Belugas, DaleStan, glx, KUDr, RichK67, Rubidium, and TrueLight (alfabetic)
  Many tnx to those who helped testing:
     Arnau, Bjarni, and tokai (alfabetic)
  And to all other people who helped testing and sending comments / bugs
  Stats: 673 lines changed, 3534 new lines, 79 new strings

1 files changed, 2 insertions, 1 deletions

diff --git a/thread.h b/thread.h
index 98f4f5cee..900b87849 100644
--- a/thread.h
+++ b/thread.h
@@ -8,6 +8,7 @@ typedef struct OTTDThread OTTDThread;
 typedef void* (*OTTDThreadFunc)(void*);
 
 OTTDThread* OTTDCreateThread(OTTDThreadFunc, void*);
-void*   OTTDJoinThread(OTTDThread*);
+void*       OTTDJoinThread(OTTDThread*);
+void        OTTDExitThread(void);
 
 #endif /* THREAD_H */