large amounts of duplicate code getfield.f and gf_getfld.f

[edwardhartnett]

In getfield.f we have:

      subroutine getfield(cgrib,lcgrib,ifldnum,igds,igdstmpl,igdslen,
     &                    ideflist,idefnum,ipdsnum,ipdstmpl,ipdslen,
     &                    coordlist,numcoord,ndpts,idrsnum,idrstmpl,
     &                    idrslen,ibmap,bmap,fld,ierr)

This file also contains code to unpack sections 3,4,5,6,7.

Then in gf_getfld.f we have:

subroutine gf_getfld(cgrib,lcgrib,ifldnum,unpack,expand,gfld,ierr)

This seems to be essentially the same code, but using gfld, the gribfied type, instead of intrinsic fortran types.

This is an over 500 line subroutine (including comments) and the unpack subroutines are in separate files, several hundreds of lines of repeated code.

This is an ugly hack.