[gembud] C009 added to parameter name in .gem files

When decoding some ECMWF grib files using dcgrib2, it's adding "C009" after the 
parameter name.  For example, TMPK becomes TMPKC009.  I can rename them back to 
what they should be using gddiag, but I was wondering if it's some field in the 
grib message that can be fixed using grib_set prior to running it through 
dcgrib2.