WaE: 'argument' : truncation of constant value

FILEVIEW_SHOW_NONE 0x80 so it doesn't fit into a sal_Int8. So make the
nFlags argument to the second SvtFileView constructor sal_uInt8
instead.

svtools/inc/svtools/fileview.hxx

@@ -93,7 +93,7 @@ protected:
 
 public:
     SvtFileView( Window* pParent, const ResId& rResId, sal_Bool bOnlyFolder, sal_Bool bMultiSelection );
-    SvtFileView( Window* pParent, const ResId& rResId, sal_Int8 nFlags );
+    SvtFileView( Window* pParent, const ResId& rResId, sal_uInt8 nFlags );
     ~SvtFileView();
 
     const String&           GetViewURL() const;

svtools/source/contnr/fileview.cxx

@@ -1238,7 +1238,7 @@ SvtFileView::SvtFileView( Window* pParent, const ResId& rResId,
     pHeaderBar->SetEndDragHdl( LINK( this, SvtFileView, HeaderEndDrag_Impl ) );
 }
 
-SvtFileView::SvtFileView( Window* pParent, const ResId& rResId, sal_Int8 nFlags ) :
+SvtFileView::SvtFileView( Window* pParent, const ResId& rResId, sal_uInt8 nFlags ) :
 
     Control( pParent, rResId )
 {