[patch, libgfortran] PR31052 Bad IOSTAT values when readings NAMELISTs past EOF

[FX Coudert]

> 2007-03-30  Jerry DeLisle  <jvdelisle@gcc.gnu.org>
>
>     PR libgfortran/31052
>     * io/file_position (st_rewind): Remove use of
>     test_endfile. Don't seek if already at 0 position.  Use new  
> is_special
>     function to set endfile state.
>     * io/open.c (test_endfile): Delete this function.
>     (edit_modes): Delete call to test_endfile.
>     (new_unit): Likewise.
>     * io/io.h: Delete prototype for test_endfile.  Add prototype
>     for is_special.
>     * io/transfer.c (next_record_r): Remove use of test_endfile.
>     (st_read):  Add test for end file condition and adjust status.

OK for mainline.