qemuDomainDeviceDefPostParse: Fetch caps from domain object
qemuDomainDeviceDefPostParse: Fetch caps from domain object

Just like we did two commits ago, don't try to fetch capabilities
for non-existing binary. Re-use the ones we have for running
domain.

Signed-off-by: Michal Privoznik <83d82aaba2eed257f4814b0c239c260c4caaadf0@redhat.com>

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