Bug#921297: FTBFS also with doxygen 1.8.16-1~exp3 from experimental

[Paolo Greppi]

Same error as with doxygen 1.8.15.

The package texlive-plain-generic contains this file:
/usr/share/texlive/texmf-dist/tex/generic/listofitems/listofitems.sty 

Paolo