Autofilter with no filtering is applied triggers a crash

In Excel 2003 XML format, when a sheet contains an autofilter area with no filtering applied, orcus-xls-xml crashes with the following

orcus-xls-xml: xls_xml_auto_filter_context.cpp:196: void orcus::xls_xml_auto_filter_context::end_auto_filter(): Assertion `m_filter_node_stack.size() == 1u' failed.

Here is an exmple file: autofilter-nofilter.xml