Before 9189cf5793 the result of
`m4_version_compare` was compared to -1, however the `$2` of
`m4_version_prereq` has different meaning and is expanded when
the required version met.
This does not (yet) change anything. The generated configure file
is the identical to previous one (except several empty lines added
and deleted).
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@61981 b2dd03c8-39d4-4d8f-98ff-823fe69b080e