Fix rare Konqueror crash in tree view mode

This relates to Bug 1820

konqueror/listview/konq_listviewitems.cc

@@ -404,6 +404,7 @@ KonqBaseListViewItem::KonqBaseListViewItem(KonqBaseListViewWidget *_listViewWidg
 ,m_bDisabled(false)
 ,m_bActive(false)
 ,m_fileitem(_fileitem)
+,m_fileitemURL(_fileitem->url())
 ,m_pListViewWidget(_listViewWidget)
 {}
 
@@ -413,6 +414,7 @@ KonqBaseListViewItem::KonqBaseListViewItem(KonqBaseListViewWidget *_listViewWidg
 ,m_bDisabled(false)
 ,m_bActive(false)
 ,m_fileitem(_fileitem)
+,m_fileitemURL(_fileitem->url())
 ,m_pListViewWidget(_listViewWidget)
 {}
 

konqueror/listview/konq_listviewitems.h

@@ -71,8 +71,11 @@ class KonqBaseListViewItem : public TDEListViewItem
       bool m_bDisabled;
       bool m_bActive; 
       
-      /** Pointer to the file item in KDirLister's list */
+      /** Pointer to the file item in KDirLister's list
+        * Don't use this unless you absolutely have to! */
       KFileItem* m_fileitem;
+      /** URL of file item */
+      KURL m_fileitemURL;
       /** Parent tree view */
       KonqBaseListViewWidget* m_pListViewWidget;
 

konqueror/listview/konq_treeviewitem.cc

@@ -89,8 +89,13 @@ void KonqListViewDir::open( bool _open, bool _reload )
   }
 }
 
+KURL KonqListViewDir::kurl()
+{
+  return m_fileitemURL;
+}
+
 TQString KonqListViewDir::url( int _trailing )
 {
-  return item()->url().url( _trailing );
+  return m_fileitemURL.url( _trailing );
 }
 

konqueror/listview/konq_treeviewitem.h

@@ -66,6 +66,11 @@ public:
    */
   virtual void setComplete( bool _b ) { m_bComplete = _b; }
 
+  /**
+   * URL of this directory
+   */
+  KURL kurl();
+
   /**
    * URL of this directory
    * @param _trailing set to true for a trailing slash (see KURL)

konqueror/listview/konq_treeviewwidget.cc

@@ -294,13 +294,13 @@ void KonqTreeViewWidget::slotDeleteItem( KFileItem *_fileItem )
 
 void KonqTreeViewWidget::openSubFolder( KonqListViewDir* _dir, bool _reload )
 {
-   m_dirLister->openURL( _dir->item()->url(), true /* keep existing data */, _reload );
+   m_dirLister->openURL( _dir->kurl(), true /* keep existing data */, _reload );
    slotUpdateBackground();
 }
 
 void KonqTreeViewWidget::stopListingSubFolder( KonqListViewDir* _dir )
 {
-   m_dirLister->stop( _dir->item()->url() );
+   m_dirLister->stop( _dir->kurl() );
    slotUpdateBackground();
 }