(svn r22989) -Fix: AIController uses protected members of AIObject, so make them friends (instead of doing it implicit via AIInstance). This fixes all compile errors with clang-2.9

src/ai/api/ai_object.hpp

@@ -37,6 +37,7 @@ typedef bool (AIModeProc)();
 class AIObject : public SimpleCountedObject {
 friend void CcAI(const CommandCost &result, TileIndex tile, uint32 p1, uint32 p2);
 friend class AIInstance;
+friend class AIController;
 protected:
 	/**
 	 * Executes a raw DoCommand for the AI.