conf: Properly report error of unsupported input bus type
conf: Properly report error of unsupported input bus type

https://bugzilla.redhat.com/show_bug.cgi?id=1188914

Add a missing jump to the error label in case the input device bus is
invalid.

Signed-off-by: Luyao Huang <23d9981432efa88691fd2a71f5525bc2174f7664@redhat.com>

zippy2/libvirt,jardasgit/libvirt,shugaoye/libvirt,taget/libvirt,agx/libvirt,olafhering/libvirt,taget/libvirt,andreabolognani/libvirt,jfehlig/libvirt,shugaoye/libvirt,olafhering/libvirt,fabianfreyer/libvirt,fabianfreyer/libvirt,andreabolognani/libvirt,shugaoye/libvirt,fabianfreyer/libvirt,libvirt/libvirt,rlaager/libvirt,shugaoye/libvirt,jfehlig/libvirt,crobinso/libvirt,zippy2/libvirt,eskultety/libvirt,rlaager/libvirt,rlaager/libvirt,crobinso/libvirt,taget/libvirt,nertpinx/libvirt,datto/libvirt,taget/libvirt,jfehlig/libvirt,andreabolognani/libvirt,agx/libvirt,rlaager/libvirt,VenkatDatta/libvirt,datto/libvirt,eskultety/libvirt,libvirt/libvirt,fabianfreyer/libvirt,VenkatDatta/libvirt,jardasgit/libvirt,nertpinx/libvirt,rlaager/libvirt,jardasgit/libvirt,fabianfreyer/libvirt,zippy2/libvirt,libvirt/libvirt,agx/libvirt,jardasgit/libvirt,taget/libvirt,datto/libvirt,eskultety/libvirt,zippy2/libvirt,eskultety/libvirt,andreabolognani/libvirt,olafhering/libvirt,agx/libvirt,VenkatDatta/libvirt,shugaoye/libvirt,jardasgit/libvirt,crobinso/libvirt,jfehlig/libvirt,datto/libvirt,agx/libvirt,crobinso/libvirt,nertpinx/libvirt,VenkatDatta/libvirt,nertpinx/libvirt,olafhering/libvirt,eskultety/libvirt,libvirt/libvirt,nertpinx/libvirt,andreabolognani/libvirt,VenkatDatta/libvirt,datto/libvirt