Fix – Blocks registered via acf_register_block_type() with a parent value of null no longer fail to register

[ockham]

What

If you register a block like this one.

add_action('acf/init', 'my_acf_blocks_init');
function my_acf_blocks_init() {

    // Check function exists.
    if( function_exists('acf_register_block_type') ) {

        // Register a testimonial block.
        acf_register_block_type(array(
            'name'              => 'testimonial',
            'title'             => __('Testimonial 2'),
            'description'       => __('A custom testimonial block. 2'),
            'render_callback'   => function(){ echo 'hello from plugin';},
            'category'          => 'formatting',
	    'parent' => null
        ));
    }
}

Without the PR you get:

Applying the patch you get the block as expected.

[cbravobernal]

Works as expected.