dolib: use _snprintf instead of snprintf
dolib: use _snprintf instead of snprintf

The latter is not available in native windows build.
The former is available in both native and mingw.

Thanks to Shiqing Fan for reporting the problem.

git-svn-id: 14be032f8f42541b1a281b51ae8ea69814daf20e@4651 4b44e086-7f34-40ce-a3bd-00e031736276

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