Fix parsing memory addresses

src/python/_rpitxmodule.c

@@ -105,7 +105,7 @@ static PyObject*
 _rpitx_broadcast_fm(PyObject* self, PyObject* args) {
 	float frequency;
 
-    assert(sizeof(sampleBase) == sizeof(unsigned long));
+	assert(sizeof(sampleBase) == sizeof(unsigned long));
 	if (!PyArg_ParseTuple(args, "Lif", &sampleBase, &sampleLength, &frequency)) {
 		PyErr_SetString(rpitxError, "Invalid arguments");
 		return NULL;

src/python/rpitx/_hidden.py

@@ -5,7 +5,6 @@ import StringIO
 import _rpitx
 import array
 import logging
-import sys
 import wave