Oops -- set the bits one at a time via _set. Using _cpu effectively

zeroed out the cpuset before setting the bit (i.e., we always had a
cpuset of 1).

This commit was SVN r23298.

opal/mca/paffinity/hwloc/paffinity_hwloc_module.c

@@ -176,7 +176,7 @@ static int module_set(opal_paffinity_base_cpu_set_t mask)
     for (i = 0; ((unsigned int) i) < OPAL_PAFFINITY_BITMASK_T_NUM_BITS; ++i) {
         if (OPAL_PAFFINITY_CPU_ISSET(i, mask) && 
             i < mca_paffinity_hwloc_component.cpuset_max_size) {
-            hwloc_cpuset_cpu(set, i);
+            hwloc_cpuset_set(set, i);
         }
     }