DomainMapper::lcl_attribute: fix missing break

Change-Id: Ibf0bd1c8bf2799ffbe5254ae11998a58d927b592
Reviewed-on: https://gerrit.libreoffice.org/16074Tested-by: Jenkins <ci@libreoffice.org>
Reviewed-by: Miklos Vajna <vmiklos@collabora.co.uk>

writerfilter/source/dmapper/DomainMapper.cxx

@@ -899,6 +899,7 @@ void DomainMapper::lcl_attribute(Id nName, Value & val)
         break;
         case NS_ooxml::LN_CT_FtnEdnRef_id:
             // footnote or endnote reference id - not needed
+        break;
         case NS_ooxml::LN_CT_Color_themeColor:
             m_pImpl->appendGrabBag(m_pImpl->m_aSubInteropGrabBag, "themeColor", TDefTableHandler::getThemeColorTypeString(nIntValue));
         break;