fix(Navigation): Fix random crashes when using navigation without waypoints

Source/CharacterPlugin/Private/VHMovement.cpp

@@ -240,7 +240,7 @@ void UVHMovement::MoveToWaypoint()
 	}
 
 	// if we are at the last waypoint and it defines destroying agent, do so
-	if (CurrentWaypointIterator == Waypoints.Num() && Waypoints[CurrentWaypointIterator - 1]->GetLastWaypointCommand() == EOnWaypointReach::Destroy)
+	if (Waypoints.Num() != 0 && CurrentWaypointIterator == Waypoints.Num() && Waypoints[CurrentWaypointIterator - 1]->GetLastWaypointCommand() == EOnWaypointReach::Destroy)
 	{
 		VirtualHumanAIController->DestroyAgent();
 	}