missing decref in __Pyx_ImportType()

Cython/Compiler/ModuleNode.py

@@ -2010,6 +2010,9 @@ static PyTypeObject *__Pyx_ImportType(const char *module_name, const char *class
         goto bad;
     result = PyObject_GetAttr(py_module, py_name);
     Py_DECREF(py_name);
+    py_name = 0;
+    Py_DECREF(py_module);
+    py_module = 0;
     if (!result)
         goto bad;
     if (!PyType_Check(result)) {
@@ -2026,6 +2029,7 @@ static PyTypeObject *__Pyx_ImportType(const char *module_name, const char *class
     }
     return (PyTypeObject *)result;
 bad:
+    Py_XDECREF(py_module);
     Py_XDECREF(result);
     return 0;
 }