[Plugin: Relevanssi – A Better Search] another error notice

When you add some page to exclude, it then throws this error notice during search:

Notice: Undefined variable: postex in /var/www/vhosts/money.cz/httpdocs/wp-content/plugins/relevanssi/relevanssi.php on line 1101

problem is this code

foreach ($aexpids as $exid){
				$exid = $wpdb->escape(trim($exid, ' -'));
				$postex .= " AND doc !='$exid'";
			}

you should

ad something like $postex = ” before that foreach

http://wordpress.org/extend/plugins/relevanssi/