tdf#130908 Chapter Numbering can't load custom style

regression from
    commit 83e97fef3fa4de900eda35d02168fcae01c85eed
    convert ImportStoredChapterNumberingRules to XFastParser

and add some more debugging trace

Change-Id: I224b9c442369a4c6a7746d7ff419f069d3430513
Reviewed-on: https://gerrit.libreoffice.org/c/core/+/89633
Tested-by: Jenkins
Reviewed-by: Noel Grandin <noel.grandin@collabora.co.uk>
diff --git a/include/xmloff/xmlimp.hxx b/include/xmloff/xmlimp.hxx
index 1970f8a..93c986f 100644
--- a/include/xmloff/xmlimp.hxx
+++ b/include/xmloff/xmlimp.hxx
@@ -381,6 +381,7 @@ public:
    XMLEventImportHelper& GetEventImport();

    static const OUString & getNameFromToken( sal_Int32 nToken );
    static OUString getPrefixAndNameFromToken( sal_Int32 nToken );
    static OUString getNamespacePrefixFromToken(sal_Int32 nToken, const SvXMLNamespaceMap* pMap);
    static OUString getNamespaceURIFromToken( sal_Int32 nToken );
    static OUString getNamespacePrefixFromURI( const OUString& rURI );
diff --git a/sw/source/uibase/config/StoredChapterNumbering.cxx b/sw/source/uibase/config/StoredChapterNumbering.cxx
index 5deb102..3f86ea1 100644
--- a/sw/source/uibase/config/StoredChapterNumbering.cxx
+++ b/sw/source/uibase/config/StoredChapterNumbering.cxx
@@ -289,7 +289,11 @@ public:
                    name = aIter.toString();
                else if (IsXMLToken(aIter.toString(), XML_DISPLAY_NAME))
                    displayName = aIter.toString();
                else
                    SAL_WARN("xmloff", "unknown value for style:family=" << aIter.toString());
            }
            else
                SAL_WARN("xmloff", "unknown attribute " << SvXMLImport::getPrefixAndNameFromToken(aIter.getToken()) << "=" << aIter.toString());

        if (nFamily != XmlStyleFamily::DATA_STYLE && !name.isEmpty() && !displayName.isEmpty())
        {
@@ -336,27 +340,40 @@ public:
        }
    }

    virtual SvXMLImportContextRef CreateChildContext(
            sal_uInt16 nPrefix,
            const OUString& rLocalName,
            const css::uno::Reference< css::xml::sax::XAttributeList >& xAttrList ) override
    {
        if (XML_NAMESPACE_TEXT == nPrefix && IsXMLToken(rLocalName, XML_OUTLINE_STYLE))
        {
            ++m_nCounter;
            if (m_nCounter <= SwChapterNumRules::nMaxRules)
            {
                SvxXMLListStyleContext *const pContext(
                    new SvxXMLListStyleContext(GetImport(),
                                nPrefix, rLocalName, xAttrList, true));
                m_Contexts.emplace_back(pContext);
                return pContext;
            }
        }
        return nullptr;
    }

    virtual css::uno::Reference<XFastContextHandler> SAL_CALL createFastChildContext(
                sal_Int32 Element,
                const css::uno::Reference< css::xml::sax::XFastAttributeList > & xAttrList ) override
    {
        if (Element == XML_ELEMENT(TEXT, XML_OUTLINE_STYLE))
        {
            ++m_nCounter;
            if (m_nCounter <= SwChapterNumRules::nMaxRules)
            {
                SvxXMLListStyleContext *const pContext(
                    new SvxXMLListStyleContext(GetImport(), Element, xAttrList, true));
                m_Contexts.emplace_back(pContext);
                return pContext;
            }
            // handled in CreateChildContext
        }
        else if (Element == XML_ELEMENT(STYLE, XML_STYLE))
        {
            return new StoredChapterNumberingDummyStyleContext(GetImport(), xAttrList);
        }

        return SvXMLImportContext::createFastChildContext(Element, xAttrList);
        return nullptr;
    }
};

diff --git a/xmloff/source/core/xmlimp.cxx b/xmloff/source/core/xmlimp.cxx
index 9165f7c..1d6bc5d 100644
--- a/xmloff/source/core/xmlimp.cxx
+++ b/xmloff/source/core/xmlimp.cxx
@@ -2030,6 +2030,11 @@ const OUString & SvXMLImport::getNameFromToken( sal_Int32 nToken )
    return xTokenHandler->getIdentifier( nToken & TOKEN_MASK );
}

OUString SvXMLImport::getPrefixAndNameFromToken( sal_Int32 nToken )
{
    return getNamespacePrefixFromToken(nToken, nullptr) + ":" + xTokenHandler->getIdentifier( nToken & TOKEN_MASK );
}

OUString SvXMLImport::getNamespacePrefixFromToken(sal_Int32 nToken, const SvXMLNamespaceMap* pMap)
{
    sal_Int32 nNamespaceToken = ( nToken & NMSP_MASK ) >> NMSP_SHIFT;