Check return result from Py_InitModule*().  This API can fail.

Probably should be backported.
diff --git a/PC/winsound.c b/PC/winsound.c
index b94b322..81e3917 100644
--- a/PC/winsound.c
+++ b/PC/winsound.c
@@ -220,6 +220,8 @@
 	PyObject *module = Py_InitModule3("winsound",
 					  sound_methods,
 					  sound_module_doc);
+	if (module == NULL)
+		return;
 	PyObject *dict = PyModule_GetDict(module);
 
 	ADD_DEFINE(SND_ASYNC);