(svn r47) -Fix StartupEconomy warning in settings_gui.c

-More British language fixes (orudge)
-Added original vehicle names file. Select it from the list. Vehicles will have real name, all other strings are in English (orudge).

settings_gui.c

@@ -487,6 +487,8 @@ void SetDifficultyLevel(int mode, GameOptions *gm_opt)
 	}
 }
 
+extern void StartupEconomy();
+
 static void GameDifficultyWndProc(Window *w, WindowEvent *e)
 {
 	switch(e->event) {