Fix MoveTo() using actor's origin instead of waypoint origin

MoveTo() was incorrectly setting the script goal to the actor's origin rather than the waypoint's origin, causing the actor to stand still instead of moving to the specified location.

code/fgame/actor.cpp

@@ -4420,7 +4420,7 @@ void Actor::MoveTo(Event *ev)
     }
 
     if (m_patrolCurrentNode) {
-        m_vScriptGoal      = origin;
+        m_vScriptGoal      = m_patrolCurrentNode->origin;
         m_bScriptGoalValid = true;
     }