In almost every case, the values of a labeledDataSequence
create a new column, and therefore the label is attached
to the last column.
However, in the case where there are no values at all,
then this function is not called (for the value portion),
resulting in no new column being created,
and thus the label overwrote the previous series label.
Empty-value columns are excluded in later code,
so perhaps we shouldn't addDataSequenceToMap either,
but I don't know the implications of that.
Change-Id: Iad4ab54552b3c6b144feb2bc223ddae538316fa7
Reviewed-on: https://gerrit.libreoffice.org/c/core/+/130946
Tested-by: Jenkins
Reviewed-by: Justin Luth <jluth@mail.com>