Pcbnew Set ALL via holes to default does not work

pcbnew/onrightclick.cpp

@@ -498,7 +498,7 @@ void WinEDA_PcbFrame::createPopupMenuForTracks( TRACK* Track, wxMenu* PopMenu )
                 _( "Export via hole to others id vias" ), global_options_pad_xpm );
             ADD_MENUITEM( via_mnu, ID_POPUP_PCB_VIA_HOLE_RESET_TO_DEFAULT,
                 _( "Set ALL via holes to default" ), apply_xpm );
-            if( !Track->IsDrillDefault() )
+            if( Track->IsDrillDefault() )   // Can't export the drill value, because this value is 0
             {
                 via_mnu->Enable( ID_POPUP_PCB_VIA_HOLE_EXPORT, FALSE );
             }

pcbnew/via_edit.cpp

@@ -88,11 +88,11 @@ void WinEDA_PcbFrame::Via_Edit_Control( wxDC* DC, int command_type, SEGVIA* via
 
     case ID_POPUP_PCB_VIA_HOLE_RESET_TO_DEFAULT:        // Reset all via hole to default value
         via_struct = m_Pcb->m_Track;
-        for( ; via_struct != NULL; via_struct = (TRACK*) via_struct->Pnext )
+        for( ; via_struct != NULL; via_struct = via_struct->Next() )
         {
             if( via_struct->Type() == TYPEVIA )     /* mise a jour du diametre de la via */
             {
-                if( via_struct->IsDrillDefault() )
+                if( ! via_struct->IsDrillDefault() )
                 {
                     via_struct->Draw( DrawPanel, DC, GR_XOR );
                     via_struct->SetDrillDefault();