Function tcod_sys::TCOD_path_new_using_function

pub unsafe extern "C" fn TCOD_path_new_using_function(
    map_width: c_int, 
    map_height: c_int, 
    func: TCOD_path_func_t, 
    user_data: *mut c_void, 
    diagonalCost: f32
) -> TCOD_path_t