patch by email that fixes a "PHP Fatal error: Call to a member function getEnclosure() on a non-object" error

QvitterPlugin.php

@@ -494,6 +494,7 @@ class QvitterPlugin extends Plugin {
         $attachment_url_to_id = array();
         if (!empty($attachments)) {
             foreach ($attachments as $attachment) {
+				if(is_object($attachment)) {                 
                 try {
                     $enclosure_o = $attachment->getEnclosure();
 	                $thumb = $attachment->getThumbnail();
@@ -507,6 +508,7 @@ class QvitterPlugin extends Plugin {
 						} 
                 }
             }
+            }
         }
 		
 		// add thumbs to $twitter_status