Oops, copied the wrong code from keeprefs. Get the right code

this time and call gc.collect(), since there is some garbage.

The original code didn't really leak (if gc.collect() was called).

Lib/test/leakers/test_ctypes.py

 
-# Taken from Lib/ctypes/test/test_keeprefs.py
+# Taken from Lib/ctypes/test/test_keeprefs.py, PointerToStructure.test().
 # When this leak is fixed, remember to remove from Misc/build.sh LEAKY_TESTS.
 
-from ctypes import Structure, c_int
+from ctypes import Structure, c_int, POINTER
+import gc
 
-def leak():
+def leak_inner():
     class POINT(Structure):
         _fields_ = [("x", c_int)]
     class RECT(Structure):
-        _fields_ = [("ul", POINT)]
+        _fields_ = [("a", POINTER(POINT))]
+
+def leak():
+    leak_inner()
+    gc.collect()