use const_iterator

sdext/source/pdfimport/tree/pdfiprocessor.cxx

@@ -824,7 +824,7 @@ void PDFIProcessor::emit( XmlEmitter&               rEmitter,
         rVisitorFactory.createOptimizingVisitor(*this));
     // FIXME: localization
     startIndicator( rtl::OUString( RTL_CONSTASCII_USTRINGPARAM( " " ) ) );
-    m_pDocument->visitedBy( *optimizingVisitor, std::list<Element*>::iterator());
+    m_pDocument->visitedBy( *optimizingVisitor, std::list<Element*>::const_iterator());
 
 #if OSL_DEBUG_LEVEL > 1
     m_pDocument->emitStructure( 0 );
@@ -836,7 +836,7 @@ void PDFIProcessor::emit( XmlEmitter&               rEmitter,
         rVisitorFactory.createStyleCollectingVisitor(aStyles,*this));
     // FIXME: localization
 
-    m_pDocument->visitedBy( *finalizingVisitor, std::list<Element*>::iterator() );
+    m_pDocument->visitedBy( *finalizingVisitor, std::list<Element*>::const_iterator() );
 
     EmitContext aContext( rEmitter, aStyles, m_aImages, *this, m_xStatusIndicator, m_xContext );
     ElementTreeVisitorSharedPtr aEmittingVisitor(
@@ -871,7 +871,7 @@ void PDFIProcessor::emit( XmlEmitter&               rEmitter,
     // emit style list
     aStyles.emit( aContext, *aEmittingVisitor );
 
-    m_pDocument->visitedBy( *aEmittingVisitor, std::list<Element*>::iterator() );
+    m_pDocument->visitedBy( *aEmittingVisitor, std::list<Element*>::const_iterator() );
     aContext.rEmitter.endTag( "office:document" );
     endIndicator();
 }