Ruby » Ruby master

parse.y: workaround for warnings

• parse.y (mark_lvar_used): enable workaround to suppress unused
  local variables. [ruby-core:82656] [Bug #13872]

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@60339 b2dd03c8-39d4-4d8f-98ff-823fe69b080e