Fix importing of latency values when exported by the minimalistic XML backend
Fix importing of latency values when exported by the minimalistic XML backend

We supported <latency value="..."/> but did not like <latency value="..."></latency>



git-svn-id: 23daf3ee82f448bbcba46f1ee0854ba3e1a50e93@3859 4b44e086-7f34-40ce-a3bd-00e031736276

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