- Fix warning when properties array is empty

program/include/rcube_ldap.php

@@ -63,7 +63,7 @@ class rcube_ldap extends rcube_addressbook
     /**
     * Object constructor
     *
-    * @param array 	LDAP connection properties
+    * @param array 	    LDAP connection properties
     * @param boolean 	Enables debug mode
     * @param string 	Current user mail domain name
     * @param integer User-ID
@@ -95,7 +95,7 @@ class rcube_ldap extends rcube_addressbook
             foreach ($p['fieldmap'] as $rf => $lf)
                 $this->fieldmap[$rf] = $this->_attr_name(strtolower($lf));
         }
-        else {
+        else if (!empty($p)) {
             // read deprecated *_field properties to remain backwards compatible
             foreach ($p as $prop => $value)
                 if (preg_match('/^(.+)_field$/', $prop, $matches))