Add test case for issue #333. Closes #333

This has been fixed by a mystery hacker.

src/test/run-pass/issue-333.rs

@@ -0,0 +1,12 @@
+fn quux[T](&T x) -> T{
+  auto f = id[T];
+  ret f(x);
+}
+
+fn id[T](&T x) -> T {
+  ret x;
+}
+
+fn main() {
+  assert quux(10) == 10;
+}