thread.c: extract timeval_sub from timeval_update_expire
It can be useful on its own.
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@62181 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
thread.c: extract timeval_sub from timeval_update_expire
It can be useful on its own.
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@62181 b2dd03c8-39d4-4d8f-98ff-823fe69b080e