Document the need to free vir*Ptr objects per-function
Document the need to free vir*Ptr objects per-function

Another patch for
https://bugzilla.redhat.com/show_bug.cgi?id=994731

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