pull: the commit size in the summary is not for the detached metadata
pull: the commit size in the summary is not for the detached metadata

Use the size specified in the summary file only for the not detached
metadata.

Signed-off-by: Giuseppe Scrivano <20002b7b24c75512093a71a58285826d5c504fca@redhat.com>

sujitfulse/ostree,gatispaeglis/ostree,resin-io/ostree,leandrosansilva/ostree,GNOME/ostree,leandrosansilva/ostree,GNOME/ostree,GNOME/ostree,gatispaeglis/ostree,resin-io/ostree,sujitfulse/ostree,resin-io/ostree,sujitfulse/ostree,leandrosansilva/ostree,leandrosansilva/ostree,gatispaeglis/ostree,gatispaeglis/ostree,resin-io/ostree,sujitfulse/ostree,gatispaeglis/ostree,gatispaeglis/ostree,GNOME/ostree,sujitfulse/ostree,leandrosansilva/ostree,GNOME/ostree,resin-io/ostree