alsamixer_getvolume: Fix incorrect parenthesis (#112)

* alsamixer_getvolume: Fix incorrect parenthesis

The pcmtypeobj check is overriding the pcmtype if the object is not NULL
or Py_None, making it impossible to get the playback volume. Fix the
paranthesis so that pcmtype is only overwritten when pcmtypeobj is not
set.

* Fix indentation format

Fix the indentation format to match the rest of the project.1

Co-authored-by: Portia <portia.stephens@biamp.com>

alsaaudio.c

@@ -2415,9 +2415,9 @@ alsamixer_getvolume(alsamixer_t *self, PyObject *args, PyObject *kwds)
 		if (self->pchannels) {
 			pcmtype = SND_PCM_STREAM_PLAYBACK;
 		}
-	}
-	else {
-		pcmtype = SND_PCM_STREAM_CAPTURE;
+		else {
+			pcmtype = SND_PCM_STREAM_CAPTURE;
+		}
 	}
 
 	result = PyList_New(0);