Use "friend class" for msvc and enabled C++11 support to avoid warning.
Use "friend class" for msvc and enabled C++11 support to avoid warning.

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