[gfortran, PR20851] Disallow dummy arguments in init exprs in elemental procedures

[Paul Thomas]

:REVIEWMAIL::

Tobias,
> Fixing this issue turned out to be very simple, because valid 
> expressions are folded by the simplifiers, i.e. the dummy argument 
> doesn't appear in their simplified versions.
Hah! A good one...
>
> The change to resolve_fl_variable() was necessary to avoid a double 
> error message being printed: is_non_constant_shape_array(), in spite 
> of its name suggesting otherwise, has side-effects and may issue 
> errors, therefore I moved it to the end of the logical expressions in 
> order to ensure that it's only called in cases where its result is 
> important.
Ah, yes indeed.
>
> Built and tested on i686-darwin.  Ok?
OK

Thanks

Paul