HDB: Stub out AI::init()

engines/hdb/ai.cpp

@@ -32,6 +32,11 @@ AI::~AI() {
 	delete _cine;
 }
 
+bool AI::init() {
+	warning("STUB: AI::init required");
+	return true;
+}
+
 void AI::processCines() {
 
 	bool complete, bailOut;

engines/hdb/ai.h

@@ -85,6 +85,8 @@ public:
 	AI();
 	~AI();
 
+	bool init();
+
 	// Cinematic Functions
 	void processCines();
 	void cineStart(bool abortable, char *abortFunc);