os/bluestore: fix bloom filter num entry miscalculation in the repairer
This could cause an assertion due to an access to uninitialized bloom
filter. This happened when detecting errors involving physical extents close to the end of a large partition.
E.g. it was observed in http://tracker.ceph.com/issues/25001 while trying to repair an OSD.
Fixes: https://tracker.ceph.com/issues/35971
Signed-off-by: Igor Fedotov <ifedotov@suse.com>
(cherry picked from commit
50919813a15d9c29c182062f88885890c55eb76e)