Fix PyTuple_SET_ITEM() usage - no return value

As noted in bpo-30459 (link bellow) the PyTuple_SET_ITEM() macro
has not a return value. Let's make code compatible with python 3.10.

Link: https://bugs.python.org/issue30459
BugLink: #2
Signed-off-by: Jaroslav Kysela <[email protected]>

Author: perexg

pyalsa/alsahcontrol.c

@@ -1543,8 +1543,8 @@ static int element_callback(snd_hctl_elem_t *elem, unsigned int mask)
 
 	t = PyTuple_New(2);
 	if (t) {
-		if (PyTuple_SET_ITEM(t, 0, (PyObject *)pyhelem))
-			Py_INCREF(pyhelem);
+		PyTuple_SET_ITEM(t, 0, (PyObject *)pyhelem);
+		Py_INCREF(pyhelem);
 		PyTuple_SET_ITEM(t, 1, PyInt_FromLong(mask));
 		r = PyObject_CallObject(o, t);
 		Py_DECREF(t);

pyalsa/alsamixer.c

@@ -1348,8 +1348,8 @@ static int element_callback(snd_mixer_elem_t *elem, unsigned int mask)
 
 	t = PyTuple_New(2);
 	if (t) {
-		if (PyTuple_SET_ITEM(t, 0, (PyObject *)pyelem))
-			Py_INCREF(pyelem);
+		PyTuple_SET_ITEM(t, 0, (PyObject *)pyelem);
+		Py_INCREF(pyelem);
 		PyTuple_SET_ITEM(t, 1, PyInt_FromLong(mask));
 		r = PyObject_CallObject(o, t);
 		Py_DECREF(t);