Fix octal bug in ocean post

Ocean post was incorrectly treating zero-padded forecast hours as octals.
This is now fixed.

Fixes NOAA-EMC#1710
Refs NOAA-EMC#1195

jobs/rocoto/ocnpost.sh

@@ -56,7 +56,7 @@ for fhr in ${fhrlst}; do
   # shellcheck disable=
   declare -x VDATE
   cd "${DATA}" || exit 2
-  if (( fhr > 0 )); then
+  if (( 10#${fhr} > 0 )); then
     # TODO: This portion calls NCL scripts that are deprecated (see Issue #923)
     if [[ "${MAKE_OCN_GRIB:-YES}" == "YES" ]]; then
       export MOM6REGRID=${MOM6REGRID:-${HOMEgfs}}