fixed that creating member profile will cause segfault (fixes #343)

Author: Kousuke Ebihara

lib/api/opAPICommunityMember.class.php

@@ -84,7 +84,7 @@ public function createEntryByInstance(Doctrine_Record $communityMember, SimpleXM
 
     foreach ($member->getProfiles() as $profile)
     {
-      $child = $profiles->addChild('div', $profile);
+      $child = $profiles->addChild('div', (string)$profile);
       $child->addAttribute('id', $profile->getName());
     }
 

lib/api/opGDataDocument.class.php

@@ -61,11 +61,11 @@ public function addValidStringToNode($node, $string)
 
     if (Doctrine::getTable('SnsConfig')->get('op_web_api_plugin_using_cdata', false))
     {
-      $child = $doc->createCDataSection($string);
+      $child = $doc->createCDataSection((string)$string);
     }
     else
     {
-      $child = $doc->createTextNode($string);
+      $child = $doc->createTextNode((string)$string);
     }
 
     $domNode->appendChild($child);