[patch, fortran] Fix PR 67219, erroneous warning

[Steve Kargl]

On Sun, Oct 30, 2016 at 05:32:52PM +0100, Thomas Koenig wrote:
> 
> the regression in question was caused by issuing a conversion
> warning for a complex constant too early, when the statement would be
> rejected later.
> 
> The solution is to throw away the warning if we do not find that
> comma.
> 
> Regression-tested.  OK for trunk and 6-branch?
> 

OK.

-- 
Steve