Fix issue when default_addressbook option is set to integer value (#1489407)

Aleksander Machniak

2014-02-05 af15c60f88f5c0f48fd577c21fd110467eb426ab

 program/steps/addressbook/func.inc

@@ -160,7 +160,7 @@
        return $CONTACTS;

    $OUTPUT->set_env('readonly', $CONTACTS->readonly);
    $OUTPUT->set_env('source', $source);
    $OUTPUT->set_env('source', (string) $source);

    // reduce/extend $CONTACT_COLTYPES with specification from the current $CONTACT object
    if (is_array($CONTACTS->coltypes)) {