* gc.c (Init_GC): fix syntax error.
	* error.c (rb_exc_new3): keeps the given string itself.
	* eval.c (Init_Proc), gc.c (Init_GC): freeze messages of preallocated
	  special exceptions also.


git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/branches/ruby_1_8_6@18325 b2dd03c8-39d4-4d8f-98ff-823fe69b080e