Fix double free in ostree_repo_pull_with_options
Fix double free in ostree_repo_pull_with_options

Duplicate the commit checksum for expected_commit_sizes since it's also
used as a value in requested_refs_to_fetch.

https://bugzilla.gnome.org/show_bug.cgi?id=750366

leandrosansilva/ostree,leandrosansilva/ostree,sujitfulse/ostree,gatispaeglis/ostree,sujitfulse/ostree,leandrosansilva/ostree,gatispaeglis/ostree,GNOME/ostree,GNOME/ostree,gatispaeglis/ostree,gatispaeglis/ostree,gatispaeglis/ostree,GNOME/ostree,sujitfulse/ostree,leandrosansilva/ostree,gatispaeglis/ostree,GNOME/ostree,sujitfulse/ostree,leandrosansilva/ostree,GNOME/ostree,sujitfulse/ostree