Constified ruby_sourcefile
which usually refers ruby_sourcefile_string and is not freed directly.
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@65655 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
Constified ruby_sourcefile
which usually refers ruby_sourcefile_string and is not freed
directly.
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@65655 b2dd03c8-39d4-4d8f-98ff-823fe69b080e