Fixes bug #548189. The code was checking for the nickname being set in the

post, but the code didn't mind if nickname wasn't set later.  This caused
the whole add code to be skipped if you missed the nickname.

src/addressbook.php

@@ -118,7 +118,7 @@ if(sqgetGlobalVar('REQUEST_METHOD', $req_method, SQ_SERVER) && $req_method == 'P
     /**************************************************
      * Add new address                                *
      **************************************************/
-    if (!empty($addaddr['nickname'])) {
+    if (isset($addaddr)) {
         foreach( $addaddr as $k => $adr ) {
             $addaddr[$k] = strip_tags( $adr );
         }