FIX (#5099):
FIX (#5099):

- use planar figure interface for accessing the controlpoints since the vertices may contain 'unused' objects in the vector.


lsanzdiaz/MITK-BiiG,danielknorr/MITK,MITK/MITK,nocnokneo/MITK,lsanzdiaz/MITK-BiiG,NifTK/MITK,rfloca/MITK,rfloca/MITK,lsanzdiaz/MITK-BiiG,rfloca/MITK,NifTK/MITK,lsanzdiaz/MITK-BiiG,rfloca/MITK,lsanzdiaz/MITK-BiiG,danielknorr/MITK,nocnokneo/MITK,danielknorr/MITK,nocnokneo/MITK,RabadanLab/MITKats,NifTK/MITK,rfloca/MITK,danielknorr/MITK,danielknorr/MITK,MITK/MITK,nocnokneo/MITK,fmilano/mitk,rfloca/MITK,nocnokneo/MITK,fmilano/mitk,NifTK/MITK,RabadanLab/MITKats,MITK/MITK,iwegner/MITK,iwegner/MITK,danielknorr/MITK,lsanzdiaz/MITK-BiiG,MITK/MITK,iwegner/MITK,fmilano/mitk,RabadanLab/MITKats,MITK/MITK,iwegner/MITK,rfloca/MITK,iwegner/MITK,fmilano/mitk,danielknorr/MITK,iwegner/MITK,fmilano/mitk,lsanzdiaz/MITK-BiiG,NifTK/MITK,RabadanLab/MITKats,fmilano/mitk,lsanzdiaz/MITK-BiiG,MITK/MITK,fmilano/mitk,NifTK/MITK,nocnokneo/MITK,RabadanLab/MITKats,RabadanLab/MITKats,nocnokneo/MITK