Fix for load_user function in modules/Users/Users.php

Second parameter $dieOnError for requireSingleResult() function is wrong.

in modules/Users/Users.php there was thsi code:

$query = "SELECT * from $this->table_name where user_name=?";

$result = this->db->requireSingleResult(query, array($usr_name), false);

In include/database/pearDatabase.php the function requireSingleResult()is defined as:

function requireSingleResult($sql, dieOnError=false,msg='', $encode=true)