qemu: Use correct variable in qemuDomainSetBlockIoTune
qemu: Use correct variable in qemuDomainSetBlockIoTune

'param' contains the correct element from 'params'.

If the group name would not be the first parameter libvirtd would crash.

Introduced in c53bd25b13.

Resolves: https://bugzilla.redhat.com/show_bug.cgi?id=1455510

andreabolognani/libvirt,fabianfreyer/libvirt,datto/libvirt,fabianfreyer/libvirt,jardasgit/libvirt,zippy2/libvirt,andreabolognani/libvirt,nertpinx/libvirt,fabianfreyer/libvirt,eskultety/libvirt,zippy2/libvirt,jardasgit/libvirt,eskultety/libvirt,VenkatDatta/libvirt,crobinso/libvirt,zippy2/libvirt,olafhering/libvirt,datto/libvirt,jardasgit/libvirt,eskultety/libvirt,jfehlig/libvirt,olafhering/libvirt,jfehlig/libvirt,eskultety/libvirt,nertpinx/libvirt,zippy2/libvirt,libvirt/libvirt,jardasgit/libvirt,eskultety/libvirt,libvirt/libvirt,nertpinx/libvirt,jfehlig/libvirt,datto/libvirt,datto/libvirt,fabianfreyer/libvirt,VenkatDatta/libvirt,olafhering/libvirt,VenkatDatta/libvirt,jardasgit/libvirt,jfehlig/libvirt,VenkatDatta/libvirt,datto/libvirt,olafhering/libvirt,andreabolognani/libvirt,libvirt/libvirt,andreabolognani/libvirt,fabianfreyer/libvirt,crobinso/libvirt,libvirt/libvirt,VenkatDatta/libvirt,crobinso/libvirt,andreabolognani/libvirt,nertpinx/libvirt,nertpinx/libvirt,crobinso/libvirt