added test for rational<short>
added test for rational<short>

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