cpuset/snprintf: Don't write 0x for empty cpusu...
cpuset/snprintf: Don't write 0x for empty cpusu...

cpuset/snprintf: Don't write 0x for empty cpusubsets

This commit was SVN r1437.

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