Fix two bad type identifiers that caused crashes on OSX (icglue and Nav).
Silence two innocuous warnings (_File and _collections).
diff --git a/Mac/Modules/Nav.c b/Mac/Modules/Nav.c
index 6786ea0..f3d8a48 100644
--- a/Mac/Modules/Nav.c
+++ b/Mac/Modules/Nav.c
@@ -403,8 +403,7 @@
 ;
 
 static PyTypeObject Navrrtype = {
-	PyObject_HEAD_INIT(&PyType_Type)
-	0,				/*ob_size*/
+	PyVarObject_HEAD_INIT(&PyType_Type, 0)
 	"Nav.NavReplyRecord",			/*tp_name*/
 	sizeof(navrrobject),		/*tp_basicsize*/
 	0,				/*tp_itemsize*/