Fixed: Release libxml2 structures before exit

--HG--
branch : develop

code/nel/include/nel/misc/i_xml.h

@@ -171,6 +171,11 @@ public:
 	  */
 	static bool		getContentString (std::string &result, xmlNodePtr node);
 
+	/**
+	  * Release meory used by libxml2, to only call before exit.
+	  */
+	static void		releaseLibXml();
+
 private:
 
 	/// From IStream

code/nel/src/misc/i_xml.cpp

@@ -103,13 +103,11 @@ void CIXml::release ()
 		// Free it
 		xmlClearParserCtxt (_Parser);
 		xmlFreeParserCtxt (_Parser);
-		// commented due to the bug #857 xmlCleanupParser ();
 
 		_Parser = NULL;
 	}
 
 	// Not initialized
-	_Parser = NULL;
 	_CurrentElement = NULL;
 	_CurrentNode = NULL;
 	_PushBegin = false;
@@ -1143,6 +1141,11 @@ bool CIXml::getContentString (std::string &result, xmlNodePtr node)
 
 // ***************************************************************************
 
+void CIXml::releaseLibXml()
+{
+	xmlCleanupParser();
+}
+
 } // NLMISC
 
 #endif // NL_DONT_USE_EXTERNAL_CODE

code/ryzom/client/src/release.cpp

@@ -664,6 +664,7 @@ void release()
 	NLGUI::CDBManager::release();
 	CWidgetManager::release();
 	CViewRenderer::release();
+	CIXml::releaseLibXml();
 
 #if FINAL_VERSION
 	// openURL ("http://www.ryzomcore.org/exit/");