quiet gcc 4.4.7 warning about saveptr use before initialization

Signed-off-by: Dwight Engen <dwight.engen@oracle.com>
Signed-off-by: Serge Hallyn <serge.hallyn@ubuntu.com>
return lxc generated name for veth pair

Doing a get_config_item for lxc.network.0.veth.pair only returns the
pair name if explicitly given, but it can be useful to know the name
even if it is the one that lxc autogenerated.

Signed-off-by: Dwight Engen <dwight.engen@oracle.com>
Signed-off-by: Serge Hallyn <serge.hallyn@ubuntu.com>