use #pragma once

include/itextstream.h

@@ -19,8 +19,7 @@
    Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
  */
 
-#if !defined( INCLUDED_ITEXTSTREAM_H )
-#define INCLUDED_ITEXTSTREAM_H
+#pragma once
 
 /// \file
 /// \brief Text-stream interfaces.
@@ -111,5 +110,3 @@ typedef Static<ErrorStreamHolder> GlobalErrorStream;
 inline TextOutputStream& globalErrorStream(){
 	return GlobalErrorStream::instance().getOutputStream();
 }
-
-#endif