bug fix: wrong type for local variables in distParabola()
bug fix: wrong type for local variables in distParabola()

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