PyInit_zlib(): Plug a small memory leak.  Jeremy is looking into the
more severe ones.
diff --git a/Modules/zlibmodule.c b/Modules/zlibmodule.c
index 9402e99..dd5804c 100644
--- a/Modules/zlibmodule.c
+++ b/Modules/zlibmodule.c
@@ -834,4 +834,5 @@
 
 	ver = PyString_FromString(ZLIB_VERSION);
 	PyDict_SetItemString(d, "ZLIB_VERSION", ver);
+	Py_DECREF(ver);
 }