fixed signed/unsigned problem
fixed signed/unsigned problem

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