...see include/svx/svxids.hrc for SID_ATTR_NUMBERFORMAT_VALUE and
chart2/source/inc/chartview/ChartSfxItemIds.hxx for
SCHATTR_AXIS_CROSSING_MAIN_AXIS_NUMBERFORMAT, and as reported by
-fsanitize=vptr in sc/qa/uitest/chart/tdf122398.py recently added to
UITest_chart (<https://ci.libreoffice.org/job/lo_ubsan/1188/>).

Change-Id: Ic1e2f3390bd54b722730e6dd7962d613587774b1
Reviewed-on: https://gerrit.libreoffice.org/67884
Tested-by: Jenkins
Reviewed-by: Stephan Bergmann <sbergman@redhat.com>