hdf5

Merge pull request #1382 in HDFFV/hdf5 from ~DEROBINS/hdf5_der:develop to develop

* commit 'e21dec94d85b02b6dd3b2020cf026414cea1eb0d':
  Updated the passthru VOL connector: * snprintf --> sprintf (for Windows compat) * tabs --> spaces * removed spurious parens from returns * Changed the logging macro to something less clash-prone