Fix of missing export macro
Fix of missing export macro

iwegner/MITK,fmilano/mitk,MITK/MITK,MITK/MITK,iwegner/MITK,fmilano/mitk,iwegner/MITK,fmilano/mitk,RabadanLab/MITKats,fmilano/mitk,MITK/MITK,RabadanLab/MITKats,MITK/MITK,RabadanLab/MITKats,RabadanLab/MITKats,iwegner/MITK,fmilano/mitk,MITK/MITK,fmilano/mitk,RabadanLab/MITKats,RabadanLab/MITKats,fmilano/mitk,iwegner/MITK,iwegner/MITK,MITK/MITK