[PATCH] PR79854 - diagnostics: gfc_conv_constant_to_tree should be gfc_internal_error

[Thomas Koenig]

Hi Dominique,

> Is the following patch OK for the trunk?
> 
> TIA
> 
> Dominique
> 
> 2018-06-10  Dominique d'Humieres  <dominiq@gcc.gnu.org>
> 
>          PR fortran/79854
>          * trans-const.c: Remove include "diagnostic-core.h"
>          (gfc_conv_constant_to_tree): Replace fatal_error with gcc_unreachable.

OK. Thanks!

	Thomas