arguments: should return negative number when error happens

We should return -ENOMEM instead of ENOMEM when realloc fails.

Signed-off-by: Qiang Huang <h.huangqiang@huawei.com>
Signed-off-by: Serge Hallyn <serge.hallyn@ubuntu.com>
lxc-create: fix the typo in help info

Fix typo in help info of lxc-create, and get rid of duplicate
comments in bdev.h

Signed-off-by: Qiang Huang <h.huangqiang@huawei.com>
Signed-off-by: Serge Hallyn <serge.hallyn@ubuntu.com>
lxc-destroy: fix the wrong help info of lxc-destroy

Changelog: jun 3: (Serge) trivial typo fix inline.

Signed-off-by: Qiang Huang <h.huangqiang@huawei.com>
Signed-off-by: Serge Hallyn <serge.hallyn@ubuntu.com>