[PATCH, libgfortran] Fix for PR25109

[Jerry DeLisle]

Jerry DeLisle wrote:
> The attached patch fixes this PR.  We were setting the default 
> BLANK=behavior to UNSPECIFIED when it should have been "NULL"
> 
> Regression tested and NIST tested:
> 
> Could be considered obvious.  I will wait to commit until tomorrow.  I 
> don't know how to do a test case for reading stdin.  I did test with the 
> examples in the pr.
> 
> 2205-11-26  Jerry DeLisle  <jvdelisle@gcc.gnu.org>
> 
>     PR libgfortran/25109
>     * io/unit.c (init_units): Set default flag to BLANK_NULL per
>     requirement of F95 standard.  Set PAD_YES for stdin.
>     (get_unit): Set PAD_YES for internal units.
> 

Committed to trunk.  r107588

Will wait a little while for 4.1, just in case.

Regards,

JerryD