Fix/cleanup hwloc_cpuset_dup
Fix/cleanup hwloc_cpuset_dup

This commit was SVN r1877.

ggouaillardet/hwloc,shekkbuilder/hwloc,ggouaillardet/hwloc,shekkbuilder/hwloc,ggouaillardet/hwloc,shekkbuilder/hwloc,ggouaillardet/hwloc,shekkbuilder/hwloc