qcow2: Let inc_refcounts() resize the reftable
Now that the refcount table can be passed around by reference, do that for inc_refcounts() (and subsequently check_refcounts_l1() and check_refcounts_l2()) and use it for resizing it when a cluster after the image end is encountered. Signed-off-by: NMax Reitz <mreitz@redhat.com> Signed-off-by: NKevin Wolf <kwolf@redhat.com>
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