fastparser: avoid boost::optional where it is un-necessary.

boost::optional appears to show up rather heavily on many profiles.
We already use mnElementToken == DONTKNOW to flag / use these guys.

Change-Id: Ibf2b0167f259cc601da2fb9703e880b78e60886e

sax/source/fastparser/fastparser.cxx

@@ -96,10 +96,10 @@ struct NameWithToken
 
 struct SaxContext
 {
-    ::com::sun::star::uno::Reference< ::com::sun::star::xml::sax::XFastContextHandler > mxContext;
-    sal_Int32                   mnElementToken;
-    boost::optional< OUString > maNamespace;
-    boost::optional< OUString > maElementName;
+    Reference< XFastContextHandler > mxContext;
+    sal_Int32 mnElementToken;
+    OUString  maNamespace;
+    OUString  maElementName;
 
     SaxContext( sal_Int32 nElementToken, const OUString& aNamespace, const OUString& aElementName ):
             mnElementToken(nElementToken)
@@ -488,7 +488,7 @@ void Entity::endElement()
         if( nElementToken != FastToken::DONTKNOW )
             xContext->endFastElement( nElementToken );
         else
-            xContext->endUnknownElement( aContext.maNamespace.get(), aContext.maElementName.get() );
+            xContext->endUnknownElement( aContext.maNamespace, aContext.maElementName );
     }
     catch (const Exception& e)
     {