[Toybox] bc power fix 2

[Rob Landley]

The only change to the bc tests since your commit 1ee1c71e9dbc was:

commit 1201a665bfa6295ef9c0fd2b1a6476e0f0f5d0ac
Author: Elliott Hughes <enh at google.com>
Date:   Thu Mar 28 12:11:22 2019 -0700

    bc: add a trivial regression test for input from stdin.

    A trivial test, but it would have caught the previous bug...

 tests/bc.test | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)


On 6/21/19 8:06 AM, Gavin Howard wrote:
> Landley has created his own version of my test suite; I do not know
> what he has done.
> 
> Gavin Howard
> 
> On Thu, Jun 20, 2019 at 11:42 PM enh <enh at google.com> wrote:
>>
>> this breaks the power tests. did you mean to update them to the
>> current upstream ones, as in the attached patch? (it's not clear to me
>> whether the tests in toybox are forked because they're 0BSD in toybox
>> but not upstream?)
>>
>> On Tue, Jun 11, 2019 at 7:09 PM Gavin Howard <gavin.d.howard at gmail.com> wrote:
>>>
>>> I accidentally put the error check into the wrong if statement...
>>>
>>> Gavin Howard
>>> _______________________________________________
>>> Toybox mailing list
>>> Toybox at lists.landley.net
>>> http://lists.landley.net/listinfo.cgi/toybox-landley.net
> _______________________________________________
> Toybox mailing list
> Toybox at lists.landley.net
> http://lists.landley.net/listinfo.cgi/toybox-landley.net
>