Fix a leak when reading empty cpumap in Linux
Fix a leak when reading empty cpumap in Linux

Simplify the code handling this

This commit was SVN r2674.

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