CPP11 — Fixed::round and truncate issue

The Fixed::round() and Fixed::truncate() functions do not mention what to
do if their scale argument is larger than the current scale. I figure they
shouldn't do anything – for example, "truncating" by making something have
more digits doesn't seem to make sense. I propose adding the sentence below
after the sentence reading "The round and truncate functions convert a
fixed value to a new value with the specified scale." (page 23-32 of
ptc/99-03-04):

If the new scale is equal to or larger than the new scale, no rounding or
truncation is performed and the result is equal to the target object.

closed/resolved