- Fix is_a() usage for PHP>5.3.6

alecpl

2011-08-27 9a835c7f7ca3b2e1e021840254a15b0205388dfc

 program/include/rcmail.php

@@ -393,7 +393,10 @@
        $id = '0';

    // use existing instance
    if (isset($this->address_books[$id]) && is_a($this->address_books[$id], 'rcube_addressbook') && (!$writeable || !$this->address_books[$id]->readonly)) {
    if (isset($this->address_books[$id]) && is_object($this->address_books[$id])
      && is_a($this->address_books[$id], 'rcube_addressbook')
      && (!$writeable || !$this->address_books[$id]->readonly)
    ) {
      $contacts = $this->address_books[$id];
    }
    else if ($id && $ldap_config[$id]) {
@@ -1163,7 +1166,7 @@
      $this->smtp->disconnect();

    foreach ($this->address_books as $book) {
      if (is_a($book, 'rcube_addressbook'))
      if (is_object($book) && is_a($book, 'rcube_addressbook'))
        $book->close();
    }