[Couenne] .sol output fix

[Pietro Belotti]

Hi Victor,

I just updated stable/0.5 and trunk. Thanks very much for the fix!

Regards,
Pietro

On Sun, Nov 1, 2015 at 8:09 PM, victor.zverovich at gmail.com
<victor.zverovich at gmail.com> wrote:
> The attached patch fixes .sol file output for trivially infeasible problems
> such as
>
>   var x >= 0;
>   s.t. c: x <= -1;
>
> Currently trying to solve it with couenne gives an error:
>
>   Error at _cmdno 4 executing "solve" command
>   (file test.ampl, line 6, offset 84):
>   Bad line in test.sol:  Couenne (test.nl May 18 2015): Infeasible
>
> because the solution format is incorrect (extra blank line at the
> beginning).
>
> Best regards,
> Victor
>
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