use sal_uInt16 to pass PoolItem WhichId

Change-Id: I29593b20d7053bf51b1ef2aee295e73c6f3b858b
Reviewed-on: https://gerrit.libreoffice.org/44650Tested-by: Jenkins <ci@libreoffice.org>
Reviewed-by: Noel Grandin <noel.grandin@collabora.co.uk>

dbaccess/source/ui/dlg/optionalboolitem.cxx

@@ -23,7 +23,7 @@ namespace dbaui
 {
 
     // OptionalBoolItem
-    OptionalBoolItem::OptionalBoolItem( sal_Int16 _nWhich )
+    OptionalBoolItem::OptionalBoolItem( sal_uInt16 _nWhich )
         :SfxPoolItem( _nWhich )
         ,m_aValue()
     {

dbaccess/source/ui/dlg/optionalboolitem.hxx

@@ -33,7 +33,7 @@ namespace dbaui
         ::boost::optional< bool >   m_aValue;
 
     public:
-        explicit OptionalBoolItem( sal_Int16 nWhich );
+        explicit OptionalBoolItem( sal_uInt16 nWhich );
 
         virtual bool             operator==( const SfxPoolItem& _rItem ) const override;
         virtual SfxPoolItem*     Clone( SfxItemPool* _pPool = nullptr ) const override;