Minor fix: unused local variable

Change-Id: I42db2c6fd90686641cd6c2f7f45d960977557ab4
Reviewed-on: https://gerrit.libreoffice.org/46416Reviewed-by: Tamás Zolnai <tamas.zolnai@collabora.com>
Tested-by: Tamás Zolnai <tamas.zolnai@collabora.com>

cui/source/tabpages/tphatch.cxx

@@ -336,7 +336,7 @@ IMPL_LINK_NOARG( SvxHatchTabPage, ModifiedBackgroundHdl_Impl, SvxColorListBox&,
         m_pCtlPreview->SetAttributes( m_aXFillAttr.GetItemSet() );
         m_pCtlPreview->Invalidate();
     }
-    m_rXFSet.Put(XFillColorItem( OUString(), m_pLbBackgroundColor->GetSelectEntryColor() ));
+    m_rXFSet.Put(XFillColorItem( OUString(), aColor ));
 
     m_pCtlPreview->SetAttributes( m_aXFillAttr.GetItemSet() );
     m_pCtlPreview->Invalidate();