Ajax result get’s 0 appended

Hello,

I have a really annoying problem here.
Whenever I do an ajax call, the result gets 0 or -1 appended.

This is for a “search suggestion” tool.

I’m using jquery’s $.post function.
Javascript:

$.post(
					ajaxurl,
					{
						action:'finditem',
						term:$('#suggest-search').val()
					},
					function(reply)
					{
						$('.suggestr').html(reply);
						$('.suggestr').show();
					}
				);

PHP:

function ajaxSearchSuggest()
{
	global $wpdb;
	$term = $_POST['term'];
	$sql = $wpdb -> prepare("SELECT <code>ID</code> FROM <code>wp_posts</code> WHERE <code>post_title</code> LIKE %s AND <code>post_status</code> = 'publish' AND <code>post_type</code> = 'post'", '%' . $term . '%');
	$results = $wpdb -> get_results($sql);
	foreach($results as $result)
	{
		$post = get_post($result -> ID);
		$categories = wp_get_post_categories($post -> ID);
		if(in_array(4, $categories))
		{
			echo '<a href="' . get_permalink($result -> ID) . '">' . $post -> post_title . '</a>';
		}
	}
}
add_action('wp_ajax_finditem', 'ajaxSearchSuggest');
add_action('wp_ajax_nopriv_finditem', 'ajaxSearchSuggest');

I get the correct results, just with “0” appended. I’ve previously used string functions to exclude it, but it’s a crappy solution, and I really want to figure out why it’s doing this.

If anyone can give me a hint I’d be really gratefull.
Thanks!