[PATCH] Tighten up checks for ASSIGN statement

[Tobias Schlüter]

Tobias Schlüter wrote:
> I ran into this when looking into PR 18827: we accepted ASSIGN statements of
> the form
>   ASSIGN 1000 TO I
> where I is an array of integers.  Actually, we allowed general expressions as
> long as they're of type integer.


Actually, this is PR 18826 :-)

- Tobi