Fix issue with pg types with OID >= 0x80000000

docs/contents/changelog.rst

@@ -8,6 +8,11 @@ Version 5.0.1
   with PyGreSQL 4.x and allows updating the primary key itself if an OID exists.
 - The connect() function of the DB API 2.0 module now accepts additional keyword
   parameters such as "application_name" which will be passed on to PostgreSQL.
+- PyGreSQL now adapts some queries to be able to access older PostgreSQL 8.x
+  databases (as suggested on the mailing list by Andres Mejia). However, these
+  old versions of PostgreSQL are not officially supported and tested any more.
+- Fixed an issue with Postgres types that have an OID >= 0x80000000 (reported
+  on the mailing list by Justin Pryzby).
 - Made C extension compatible with MSVC 9 again (this was needed to compile for
   Python 2 on Windows).
 

pgmodule.c

@@ -443,7 +443,7 @@ cast_sized_text(char *s, Py_ssize_t size, int encoding, int type)
    This needs the character string, size, encoding, the Postgres type
    and the external typecast function to be called. */
 static PyObject *
-cast_other(char *s, Py_ssize_t size, int encoding, int pgtype,
+cast_other(char *s, Py_ssize_t size, int encoding, Oid pgtype,
 	PyObject *cast_hook)
 {
 	PyObject *obj;
@@ -453,7 +453,7 @@ cast_other(char *s, Py_ssize_t size, int encoding, int pgtype,
 	if (cast_hook)
 	{
 		PyObject *tmp_obj = obj;
-		obj = PyObject_CallFunction(cast_hook, "(Oi)", obj, pgtype);
+		obj = PyObject_CallFunction(cast_hook, "(OI)", obj, pgtype);
 		Py_DECREF(tmp_obj);
 	}
 	return obj;