[boost] [release, heap] bug fix merge request

i'd like to ask permission to merge one trivial fix for boost.heap from trunk into release [1]. it fixes an error that was reported on the boost-user list yesterday. i know it is pretty late, but as boost.heap is a new library it won't introduce a regression ... thanks, tim [1] https://github.com/ryppl/boost- svn/commit/65e619ffba40d3f2243cb235a906d4d75d9651c1