Fix ord test breakage.

src/test/compile-fail/issue-3344.rs

 enum thing = uint;
 impl thing : cmp::Ord { //~ ERROR missing method `gt`
-    pure fn lt(other: &thing) -> bool { *self < *other }
-    pure fn le(other: &thing) -> bool { *self < *other }
-    pure fn ge(other: &thing) -> bool { *self < *other }
+    pure fn lt(other: &thing) -> bool { *self < **other }
+    pure fn le(other: &thing) -> bool { *self < **other }
+    pure fn ge(other: &thing) -> bool { *self < **other }
 }
 fn main() {}