* error.c (exc_to_s, name_err_to_s, name_err_mesg_to_str): do not
	  taint messages.


git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/branches/ruby_1_9_3@37162 b2dd03c8-39d4-4d8f-98ff-823fe69b080e