Function vips_sys::g_convert_with_fallback

pub unsafe extern "C" fn g_convert_with_fallback(
    str: *const gchar, 
    len: gssize, 
    to_codeset: *const gchar, 
    from_codeset: *const gchar, 
    fallback: *const gchar, 
    bytes_read: *mut gsize, 
    bytes_written: *mut gsize, 
    error: *mut *mut GError
) -> *mut gchar