<toolset-msvc:version>7.1 <toolset>msvc
we used to get error if default value of <toolset-msvc:version> is 6.0.
* build/feature.jam
(expand-subfeatures-aux): Do no apply subfeature defaults, since it causes
the above troubles and is also performed in 'add-defaults'.
[SVN r22607]
Vladimir Prus