ceph/ceph — pull request #776 by hjwsm1989 (2013-10-28 04:21:57+00:00)
Title:    fix the bug if we set pgp_num=-1 using "ceph osd pool set data|metada...

...ta|rbd -1"

will set the pgp_num to a hunge number.

Signed-off-by: huangjun