[PATCH,fortran] Fix logical comparison diagnostic message

[Daniel Franke]

On Thursday 26 July 2007 19:00:57 Steve Kargl wrote:
> This probably qualifies as "obviously correct", but it someone
> would cast an eye of the patch I'd appreciate it.

Steve,
as the one who caused this regression, I think it looks ok.

One note: there is logical_comp.f90 in the testsuite which already includes 
these tests.

Thanks for fixing.

	Daniel