Fix bug where contacts with no email address were listed on compose addressbook (#1489970)

CHANGELOG

@@ -20,6 +20,7 @@ CHANGELOG Roundcube Webmail
 - Fix incorrect label translation in return receipt (#1489963)
 - Fix security issue in delete-response action - allow only ajax request
 - Fix Delete button state after deleting identity/response (#1489972)
+- Fix bug where contacts with no email address were listed on compose addressbook (#1489970)
 
 RELEASE 1.0.1
 -------------

program/lib/Roundcube/rcube_contacts.php

@@ -264,7 +264,7 @@ class rcube_contacts extends rcube_addressbook
             if ($read_vcard)
                 $sql_arr = $this->convert_db_data($sql_arr);
             else {
-                $sql_arr['email'] = explode(self::SEPARATOR, $sql_arr['email']);
+                $sql_arr['email'] = $sql_arr['email'] ? explode(self::SEPARATOR, $sql_arr['email']) : array();
                 $sql_arr['email'] = array_map('trim', $sql_arr['email']);
             }