Nit-pick: Added a 'default' clause for a switch-case

Change-Id: I241d7cc1cc530b8d3fae7fd7bd185285e16e3b5b
Reviewed-on: https://gerrit.libreoffice.org/7819Reviewed-by: Miklos Vajna <vmiklos@collabora.co.uk>
Tested-by: Miklos Vajna <vmiklos@collabora.co.uk>

writerfilter/source/dmapper/DomainMapper_Impl.cxx

@@ -1516,6 +1516,8 @@ void DomainMapper_Impl::CreateRedline( uno::Reference< text::XTextRange > xRange
             case ooxml::OOXML_ParagraphFormat:
                 sType = rPropNameSupplier.GetName( PROP_PARAGRAPH_FORMAT );
                 break;
+            default:
+                throw ::com::sun::star::lang::IllegalArgumentException("illegal redline token type", NULL, 0);
             }
             uno::Reference < text::XRedline > xRedline( xRange, uno::UNO_QUERY_THROW );
             beans::PropertyValues aRedlineProperties( 3 );