Corrupt pointers with Cray Fortran/11.0.2

[njansson]

The Cray compiler might corrupt the pointer returned by the %array() procedure and only return parts of the array.

A workaround is to work directly with the unlimited polymorphic type data e.g. translate constructs like:

zp => new_zone_dist(pe_rank)%array()
do i = 1, new_zone_dist(pe_rank)%size()
   if (zp(i)%type .eq. 5) then
      call pe_lst%push(zp(i)%p_e)
   end if
end do

to

select type(zp => new_zone_dist(pe_rank)%data)
type is (nmsh_zone_t)
   do i = 1, new_zone_dist(pe_rank)%size()
      if (zp(i)%type .eq. 5) then
         call pe_lst%push(zp(i)%p_e)
      end if
   end do
end select

This relates to #196 #198