Function khronos_egl::matching_config_count

pub fn matching_config_count(
    display: Display, 
    attrib_list: &[Int]
) -> Result<usize, Error>

Return the number of EGL frame buffer configurations that atch specified attributes.

This will call eglChooseConfig without null as configs to get the number of matching configurations.

This will return a BadParameter error if attrib_list is not a valid attributes list (if it does not terminate with NONE).