[patch, fortran] Fix PR41235, accepts invalid

[Tobias Burnus]

Am 10.12.2009 22:52, schrieb Tobias Burnus:
> I am not sure that the patch is correct. I think one refers to the
> following item in the standard:
>
> "A procedure [...] shall have an explicit interface if it is referenced and
> [...]
>  (3) The procedure has a result that [...]
>    (c) has a nonassumed type parameter value that is not an initialization
>        expression,"
>   
I updated the patch now:

a) I deleted the current check, which rejected valid programs, where one
had an implicit interface with  non-init-expr character lengths.
b) I added a check using -fwhole-file, which does prints an error under
the constraint that gfortran knows that the function is does not have a
assumed-length type parameter.

Bootstrapped and regtested on x86-64-linux.
OK for the trunk?

Tobias
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