Fix lstopo crash in verbose messages about offl...
Fix lstopo crash in verbose messages about offl...

Fix lstopo crash in verbose messages about offline/disallowed/... processors when root has no cpuset, just don't display anything for now

This commit was SVN r3918.

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