Bug around legend of a pie chart

[Tamas Bunth]

Hi Bartosz, Markus,

I've filed a bug on Bugzilla:
https://bugs.documentfoundation.org/show_bug.cgi?id=122765#add_comment

which looks like a regression of the following commit:
0fc41c53dfbd21e526fb0ad68a6651693c4a2ecd

I've tried to solve the problem without any success so far. I couldn't fix the
bug without recreating the issue that it solved (tdf#118150).

I was wondering if you have any suggestions how to solve both of the bugs.

Thank you,
Tamás Bunth