Add missing unlocks to error paths of mountpoint_last.
Add missing unlocks to error paths of mountpoint_last.

Signed-off-by: Dave Jones <d5ec0d24602845f6f4b6a35ef729998d1fba5507@fedoraproject.org>
Signed-off-by: Al Viro <de609eb4d5d70b1d38ec6642adbfc33a2781f63c@zeniv.linux.org.uk>

KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs