Fix #58 by Jan Chylik - lsmcrossection works only for isurf==1, other…

…wise disable and print warning

src/modlsmcrosssection.f90

@@ -72,6 +72,7 @@ subroutine initlsmcrosssection
     use modmpi,   only :myid,my_real,mpierr,comm3d,mpi_logical,mpi_integer,cmyid
     use modglobal,only :imax,jmax,ifnamopt,fname_options,dtmax,dtav_glob,ladaptive,j1,dt_lim,cexpnr,tres,btime,checknamelisterror
     use modstat_nc,only : lnetcdf,open_nc, define_nc,ncinfo,nctiminfo,writestat_dims_nc
+    use modsurfdata, only : isurf
    implicit none
 
     integer :: ierr
@@ -92,6 +93,11 @@ subroutine initlsmcrosssection
       close(ifnamopt)
     end if
 
+    if (lcross .and. (isurf .ne. 1)) then
+       lcross = .FALSE.
+       write (6,*) "Ignoring lcross, lsmcrossection currently implemented only for isurf==1."
+    endif
+
     call MPI_BCAST(dtav       ,1,MY_REAL    ,0,comm3d,mpierr)
     call MPI_BCAST(lcross     ,1,MPI_LOGICAL,0,comm3d,mpierr)
     call MPI_BCAST(crossheight,1,MPI_INTEGER,0,comm3d,mpierr)