Restore back old navigation system

src/Character.h

@@ -59,7 +59,7 @@ public:
     void setTarget(const Eigen::Vector3f& target, std::function<void()> onArrived = nullptr, std::string callbackName = "");
     void stopAndRotateToTarget(int npcId);
 
-    bool forceReplan();
+    void forceReplan();
     void stopInPlace() { state.stopInPlace(); }
 
     // ---- Reset ----