docker/libcontainer — pull request #227 by hugoduncan (2014-10-17 21:59:41+00:00)
Title: Fix RtAttr.Len for case with childreen

In RtAttr.ToWireFormat, the children are written with the length aligned with
rtaAlignOf. The length calculated in RtAttr.Len should reflect this,
otherwise the slice allocated in RtAttr.ToWireFormat is too small.