Avoid expensive ffsl/flsl calls in cpuset operations
Avoid expensive ffsl/flsl calls in cpuset operations

Testing if a word does have any bit set should be considered less expensive
than calling ffsl/flsl first and than test this.

Thanks to Bert Wesarg for the patch.

git-svn-id: 14be032f8f42541b1a281b51ae8ea69814daf20e@1836 4b44e086-7f34-40ce-a3bd-00e031736276

BlueBrain/hwloc,BlueBrain/hwloc,BlueBrain/hwloc,BlueBrain/hwloc