git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/branches/ruby_1_9_3@44748 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
rb_int_succ(). this fixes test failure on OS X introduced at r44745.
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/branches/ruby_1_9_3@44748 b2dd03c8-39d4-4d8f-98ff-823fe69b080e