Fixed hdf5 type conversion error introduced by last commit
Fixed hdf5 type conversion error introduced by last commit

amandalund/openmc,amandalund/openmc,walshjon/openmc,johnnyliu27/openmc,keadyk/openmc_mg_prepush,paulromano/openmc,lilulu/openmc,samuelshaner/openmc,wbinventor/openmc,bhermanmit/cdash,walshjon/openmc,mit-crpg/openmc,paulromano/openmc,wbinventor/openmc,shenqicang/openmc,samuelshaner/openmc,mjlong/openmc,bhermanmit/openmc,shikhar413/openmc,wbinventor/openmc,liangjg/openmc,paulromano/openmc,shikhar413/openmc,liangjg/openmc,samuelshaner/openmc,paulromano/openmc,mit-crpg/openmc,keadyk/openmc_mg_prepush,walshjon/openmc,mjlong/openmc,lilulu/openmc,johnnyliu27/openmc,shenqicang/openmc,nhorelik/openmc,nhorelik/openmc,bhermanmit/openmc,shikhar413/openmc,mit-crpg/openmc,sxds/opemmc,sxds/opemmc,smharper/openmc,mit-crpg/openmc,smharper/openmc,smharper/openmc,smharper/openmc,wbinventor/openmc,johnnyliu27/openmc,kellyrowland/openmc,johnnyliu27/openmc,shikhar413/openmc,liangjg/openmc,kellyrowland/openmc,amandalund/openmc,amandalund/openmc,samuelshaner/openmc,walshjon/openmc,keadyk/openmc_mg_prepush,lilulu/openmc,liangjg/openmc