[Patch, Fortran] Add missing coarray check

[Tobias Burnus]

I have now committed it as obvious.

The constraint, I couldn't find, was/is C546 (thanks to Reinhard Bader). 
With coarrays, I tend to have the problem whether the best search term 
is coarray or codimension (or sometimes also: coindexed, corank).

Committed as Rev. 212540

Tobias

Tobias Burnus wrote:
> While checking whether gfortran already handles the new constraint at 
> http://j3-fortran.org/doc/year/14/14-140r2.txt (it does), I found the 
> following issues:
>
> a) Coarray variables with pointer attribute weren't rejected.
> b) There was a copy'n'paste error in symbol.c, having cray_pointer at 
> places where one should have cray_pointee, such that the cray-pointer 
> test had been done twice.
>
> Build and regtested on x86-64-gnu-linux.
> OK for the trunk?
>
> * * *
>
> Admittedly, I cannot find the constraint for (a), but I am certain 
> that it is not intended to permit the POINTER attribute. Even using 
> C526 plus C528 still seem to permit "integer, save, pointer :: 
> caf[*]". I have now asked at the J3 mailing list for a pointer to the 
> right constraint. At least Cray's compiler (correctly?!?) rejects 
> coarrays with pointer attribute.
>
> Tobias