trivial: fix error reporting
trivial: fix error reporting

Signed-off-by: Serge Hallyn <3df611b026e4639bee8aef7a4beb2e39fcebb313@ubuntu.com>

hallyn/cgmanager-pkg-ubuntu,udeved/cgmanager,lxc/cgmanager,udeved/cgmanager,hallyn/cgmanager,hustcat/cgmanager,hallyn/cgmanager,hallyn/cgmanager-pkg-ubuntu,hustcat/cgmanager,lxc/cgmanager