Fix exception causes in vq.py
Fix exception causes in vq.py

perimosocordiae/scipy,matthew-brett/scipy,ilayn/scipy,zerothi/scipy,vigna/scipy,zerothi/scipy,nmayorov/scipy,Stefan-Endres/scipy,Stefan-Endres/scipy,matthew-brett/scipy,andyfaff/scipy,anntzer/scipy,scipy/scipy,tylerjereddy/scipy,nmayorov/scipy,ilayn/scipy,andyfaff/scipy,scipy/scipy,tylerjereddy/scipy,e-q/scipy,mdhaber/scipy,rgommers/scipy,matthew-brett/scipy,perimosocordiae/scipy,WarrenWeckesser/scipy,ilayn/scipy,mdhaber/scipy,tylerjereddy/scipy,mdhaber/scipy,matthew-brett/scipy,vigna/scipy,Stefan-Endres/scipy,e-q/scipy,rgommers/scipy,mdhaber/scipy,endolith/scipy,mdhaber/scipy,vigna/scipy,Stefan-Endres/scipy,perimosocordiae/scipy,endolith/scipy,e-q/scipy,endolith/scipy,Eric89GXL/scipy,perimosocordiae/scipy,Eric89GXL/scipy,rgommers/scipy,e-q/scipy,nmayorov/scipy,zerothi/scipy,andyfaff/scipy,anntzer/scipy,rgommers/scipy,endolith/scipy,ilayn/scipy,Stefan-Endres/scipy,andyfaff/scipy,grlee77/scipy,grlee77/scipy,nmayorov/scipy,matthew-brett/scipy,WarrenWeckesser/scipy,perimosocordiae/scipy,e-q/scipy,Eric89GXL/scipy,WarrenWeckesser/scipy,andyfaff/scipy,perimosocordiae/scipy,vigna/scipy,ilayn/scipy,tylerjereddy/scipy,WarrenWeckesser/scipy,grlee77/scipy,grlee77/scipy,WarrenWeckesser/scipy,scipy/scipy,zerothi/scipy,anntzer/scipy,anntzer/scipy,Eric89GXL/scipy,andyfaff/scipy,Stefan-Endres/scipy,mdhaber/scipy,WarrenWeckesser/scipy,vigna/scipy,endolith/scipy,anntzer/scipy,grlee77/scipy,zerothi/scipy,ilayn/scipy,scipy/scipy,anntzer/scipy,rgommers/scipy,nmayorov/scipy,zerothi/scipy,Eric89GXL/scipy,scipy/scipy,Eric89GXL/scipy,endolith/scipy,tylerjereddy/scipy,scipy/scipy