compile error

[lcbowling]

octomap_path_planner/src/navigation_function_node.cpp: In member function ‘void NavigationFunction::onOctomap(const ConstPtr&)’:
/home/lc/23d/src/2D_3D_paper/octomap_path_planner/src/navigation_function_node.cpp:153:52: error: invalid conversion from ‘octomap::AbstractOcTree*’ to ‘octomap::OcTree*’ [-fpermissive]
octree_ptr_ = octomap_msgs::binaryMsgToMap(*msg);

src/next_best_view_node.cpp: In member function ‘void NextBestView::onOctomap(const ConstPtr&)’:
/home/lc/23d/src/2D_3D_paper/octomap_path_planner/src/next_best_view_node.cpp:297:52: error: invalid conversion from ‘octomap::AbstractOcTree*’ to ‘octomap::OcTree*’ [-fpermissive]
octree_ptr_ = octomap_msgs::binaryMsgToMap(*map);