string.c: compare with to_str
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@38044 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
string.c: compare with to_str
possible before calling <=> method. [ruby-core:49279] [Bug #7342]
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@38044 b2dd03c8-39d4-4d8f-98ff-823fe69b080e