bugfix (a few bugs seems to be remaining yet.)

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@2336 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

ext/dl/sym.c

@@ -261,7 +261,7 @@ rb_dlsym_inspect(VALUE self)
   str = dlmalloc(str_size);
   snprintf(str, str_size - 1,
 	   "#<DL::Symbol:0x%x func=0x%x '%s'>",
-	   sym, sym->func, RSTRING(proto)->len);
+	   sym, sym->func, RSTRING(proto)->ptr);
   val = rb_tainted_str_new2(str);
   dlfree(str);