[boost] [real_concept] Problem with round() family of functions

Hi John, while moving the new Spirit to the Boost SVN I came across the new functions introduced to allow rounding and truncation to an integer. Cool, thanks for adding these. But now I have the problem, that these functions are in a different namespace as the original real_concept class, which makes it impossible for the compiler to find these through ADL. Is there any reason why you didn't put the round() and truncate() functions for the real_concept class in the 'namespace concepts' instead? Do I miss something? Regards Hartmut