get and set methods for 'gallery_attachment_ids' actually expect arrays

[markheydon]

Hi,

The class headers threw me a little until I started digging through the code to work out why my string of attachment ids wasn't working! The getter/setter for gallery_attachment_ids says string but actually needs to be an array.

	/** @var String */
	private $gallery_attachment_ids;

	/**
	 * @return String
	 */
	public function get_gallery_attachment_ids() {
		return $this->gallery_attachment_ids;
	}

	/**
	 * @param String $gallery_attachment_ids
	 */
	public function set_gallery_attachment_ids( $gallery_attachment_ids ) {
		$this->gallery_attachment_ids = $gallery_attachment_ids;
	}

Persist method converts the array to a string; and retrieve converts the string to an array.

Mark