clang compatibility fix
clang compatibility fix

dstoe/vigra,timoMa/vigra,DaveRichmond-/vigra,funkey/vigra,ThomasWalter/vigra,xiwei-zhang/vigra,martinsch/vigra,capturePointer/vigra,dagophil/vigra,dagophil/vigra,cha007/vigra,hmeine/vigra,psteinb/vigra,dstoe/vigra,ThomasWalter/vigra,stuarteberg/vigra,ThomasWalter/vigra,DaveRichmond-/vigra,xiwei-zhang/vigra,DaveRichmond-/vigra,capturePointer/vigra,DaveRichmond-/vigra,DaveRichmond-/vigra,dstoe/vigra,timoMa/vigra,kod3r/vigra,stuarteberg/vigra,ThomasWalter/vigra,mmuellner/vigra,funkey/vigra,timoMa/vigra,mmuellner/vigra,stuarteberg/vigra,martinsch/vigra,martinsch/vigra,timoMa/vigra,stuarteberg/vigra,kod3r/vigra,hmeine/vigra,psteinb/vigra,kod3r/vigra,hmeine/vigra,hmeine/vigra,xiwei-zhang/vigra,mmuellner/vigra,funkey/vigra,martinsch/vigra,dstoe/vigra,hmeine/vigra,dstoe/vigra,ThomasWalter/vigra,hmeine/vigra,mmuellner/vigra,funkey/vigra,mmuellner/vigra,funkey/vigra,capturePointer/vigra,dagophil/vigra,mmuellner/vigra,psteinb/vigra,hmeine/vigra,martinsch/vigra,dstoe/vigra,capturePointer/vigra,capturePointer/vigra,kod3r/vigra,capturePointer/vigra,cha007/vigra,psteinb/vigra,timoMa/vigra,kod3r/vigra,dagophil/vigra,kod3r/vigra,psteinb/vigra,timoMa/vigra,martinsch/vigra,cha007/vigra,stuarteberg/vigra,xiwei-zhang/vigra,ThomasWalter/vigra,dagophil/vigra,funkey/vigra,capturePointer/vigra,mmuellner/vigra,xiwei-zhang/vigra,ThomasWalter/vigra,cha007/vigra,dstoe/vigra,dagophil/vigra,kod3r/vigra,stuarteberg/vigra,funkey/vigra,xiwei-zhang/vigra,DaveRichmond-/vigra,dagophil/vigra,cha007/vigra,timoMa/vigra,psteinb/vigra,cha007/vigra,psteinb/vigra,DaveRichmond-/vigra,cha007/vigra,stuarteberg/vigra,xiwei-zhang/vigra