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/**
 * Gravity Wiz // Gravity Forms // Dynamic Population: Is Post Author?
 * http://gravitywiz.com/
 */
add_filter( 'gform_field_value_is_post_author', 'gw_dyn_pop_is_post_author' );
function gw_dyn_pop_is_post_author() {
	global $post;
	return $post ? get_current_user_id() == $post->post_author : false;
}