Fix removing contact photo using LDAP addressbook (#1488420)

CHANGELOG

@@ -1,6 +1,7 @@
 CHANGELOG Roundcube Webmail
 ===========================
 
+- Fix removing contact photo using LDAP addressbook (#1488420)
 - Fix storing X-ANNIVERSARY date in vCard format (#1488527)
 - Update to Mail_Mime-1.8.5 (#1488521)
 - Fix Shift + delete button does not permanently delete messages (#1488243)

program/include/rcube_ldap.php

@@ -1191,8 +1191,11 @@ class rcube_ldap extends rcube_addressbook
                     else if ($val == '') {
                         // Field supplied is empty, verify that it is not required.
                         if (!in_array($fld, $this->prop['required_fields'])) {
-                            // It is not, safe to clear.
+                            // ...It is not, safe to clear.
-                            $deletedata[$fld] = $old_data[$fld];
+                            // #1488420: Workaround "ldap_mod_del(): Modify: Inappropriate matching in..."
+                            // jpegPhoto attribute require an array() here. It looks to me that it works for other attribs too
+                            $deletedata[$fld] = array();
+                            //$deletedata[$fld] = $old_data[$fld];
                         }
                     }
                     else {