[Bug fortran/65025] Internal compiler error with preprocessor in gfortran

[fkrogh#gcc at mathalacarte dot com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=65025

--- Comment #4 from Fred Krogh <fkrogh#gcc at mathalacarte dot com> ---
In collapsing a big code to the small example, I left out a line that should be
there.  Add below the first line

  use ISO_C_BINDING, only: C_DOUBLE, C_FLOAT, C_LONG_DOUBLE

This has no effect however on the internal compiler error.