From: Kevin Corry <kevcorry@us.ibm.com>

Fix an OB1 error when calculating an output buffer size, that could cause a
missing null termininator in the 'list devices' ioctl results.  [Steffan
Paletta]
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>