Function xcb::ffi::xfixes::xcb_xfixes_create_region_from_gc_checked

pub unsafe extern "C" fn xcb_xfixes_create_region_from_gc_checked(
    c: *mut xcb_connection_t, 
    region: xcb_xfixes_region_t, 
    gc: xcb_gcontext_t
) -> xcb_void_cookie_t