Pager does not work properly on user ticket view page

On page
support/user/(id)
works support_page_user function.
When creating a count_query the code

$sql_count = "SELECT COUNT(DISTINCT(n.nid)) FROM {node} n LEFT JOIN {support_ticket} t ON n.nid = t.nid LEFT JOIN {comments} c ON n.nid = c.nid WHERE (c.status = ". COMMENT_PUBLISHED ." OR c.status IS NULL) AND n.status = 1 AND n.type = 'support_ticket' AND t.assigned = $user->uid $state";

does not check if $assigned=false, And result of this query returns zero even if we have rows to show.
I have changed the code above on this:

    if (!$assigned) {
      $sql_count = "SELECT COUNT(DISTINCT(n.nid)) FROM {node} n LEFT JOIN {support_ticket} t ON n.nid = t.nid LEFT JOIN {comments} c ON n.nid = c.nid WHERE (c.status = ". COMMENT_PUBLISHED ." OR c.status IS NULL) AND n.status = 1 AND n.type = 'support_ticket' AND (t.assigned = $user->uid OR n.uid = $user->uid) $state";
    } else {
    	$sql_count = "SELECT COUNT(DISTINCT(n.nid)) FROM {node} n LEFT JOIN {support_ticket} t ON n.nid = t.nid LEFT JOIN {comments} c ON n.nid = c.nid WHERE (c.status = ". COMMENT_PUBLISHED ." OR c.status IS NULL) AND n.status = 1 AND n.type = 'support_ticket' AND t.assigned = $user->uid $state";
    }

and it began work correct.