bugfix: to get the signals for a pdu you have to use follow_all_ref instead of follow_ref (#591)
bugfix: to get the signals for a pdu you have to use follow_all_ref instead of follow_ref (#591)

Co-authored-by: Markus Konrad <8b0ea3b836ca572ab8abe85a74ea79fb418787ae@rebug.org>
ebroecker/canmatrix,ebroecker/canmatrix