Function emscripten_sys::emscripten_set_pointerlockchange_callback

pub unsafe extern fn emscripten_set_pointerlockchange_callback(target: *const c_char,
                                                               userData: *mut c_void,
                                                               useCapture: c_int,
                                                               callback: em_pointerlockchange_callback_func)
                                                               -> c_int