(svn r2807) Fix two major bugs in the threaded save code:

- Do not dereference a local variable which no longer exists; this lead to random crashes when saving
- (Win32) Do not close a handle before it is used last
There are still many major problems (race conditions and resulting memory corruption/crashes) left

functions.h

@@ -279,6 +279,5 @@ void DeterminePaths(void);
 
 void bubblesort(void *base, size_t nmemb, size_t size, int(*compar)(const void *, const void *));
 bool CreateOTTDThread(void *func, void *param);
-void CloseOTTDThread(void);
 void JoinOTTDThread(void);
 #endif /* FUNCTIONS_H */