[patch,gfortran] Fix PR17917 - module equivalences

[Paul THOMAS]

Steven,

> + /* Equivalenced variables arrive here after creation. */
> + if (sym->backend_decl && sym->equiv_built)
> + return;
> + 
> 
> Odd indentation.
>

Thanks.
 
> 
> + const char *module;
> 
> Could you explain what this is for? I see we write it and read it,
> but it's not used for anything else. Needed for follow-up work?
>
 
I saw that too; I presumed that I was missing something and left it alone.  I'll check out all the uses of gfc_equiv->module in the other product.

Paul T