linux-gcc-openmp compile breaks on standard linux setup

[ahbarnett]

Same setup as Issue #1.
Except uncomment HOST = linux-gcc-openmp in makefile.

make gives:

...
gfortran  -O2  -w --openmp -fdefault-integer-8 -finteger-4-integer-8 -c src/chebtarggridrouts.f90 -o src/chebtarggridrouts.o
src/chebtarggridrouts.f90:777:27:

  777 |   call chebexps(itype,k,ts,uk,vk,wts)
      |                           1
......
 1373 |   call chebexps(itype,norder,xpts,utmp,vtmp,wts)
      |                                  2
Error: Rank mismatch between actual argument at (1) and actual argument at (2) (scalar and rank-2)
src/chebtarggridrouts.f90:306:10:

  179 |       nexpc,radexp,idivflag,ndiv,isep,nlmax,nbmax,nlevelsfmm, &
      |            2
......
  306 |       nt2,trads,idivflag,ndiv,isep,nlmax,nbmax,nlevelsfmm, &
      |          1
Error: Rank mismatch between actual argument at (1) and actual argument at (2) (scalar and rank-1)
src/chebtarggridrouts.f90:316:6:

  189 |       radexp,idivflag,ndiv,isep,mhung,mnbors,mnlist1, &
      |      2
......
  316 |       trads,idivflag,ndiv,isep,mhung,mnbors,mnlist1, &
      |      1
Error: Rank mismatch between actual argument at (1) and actual argument at (2) (scalar and rank-1)
make: *** [makefile:149: src/chebtarggridrouts.o] Error 1