Fix 404 pages returning true for have_posts if permalinks have a prefix ie "/news/%postname/"

404-fix.php

<?php
function cameronjonesweb_404_fix() {
	global $wp_query;
	if ( $wp_query->is_404 ) {
		$wp_query->posts        = array();
		$wp_query->current_post = 0;
		$wp_query->post         = null;
	}
}

add_action( 'template_redirect', 'cameronjonesweb_404_fix' );