block/dirty-bitmaps: fix merge permissions
In prior commits that made merge transactionable, we removed the assertion that merge cannot operate on disabled bitmaps. In addition, we want to make sure that we are prohibiting merges to "locked" bitmaps. Use the new user_locked function to check. Reported-by: NEric Blake <eblake@redhat.com> Signed-off-by: NJohn Snow <jsnow@redhat.com> Reviewed-by: NEric Blake <eblake@redhat.com> Reviewed-by: NVladimir Sementsov-Ogievskiy <vsementsov@virtuozzo.com> Message-id: 20181002230218.13949-3-jsnow@redhat.com Signed-off-by: NJohn Snow <jsnow@redhat.com>
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