Clarify why there are dynamic imports in AudioDev().
This will enlighten Andrew Dalke; I don't know about kjpylint. :-)
diff --git a/Lib/audiodev.py b/Lib/audiodev.py
index c76a502..83bd6ef 100644
--- a/Lib/audiodev.py
+++ b/Lib/audiodev.py
@@ -209,6 +209,7 @@
 		return BUFFERSIZE - self.getfilled()
 
 def AudioDev():
+	# Dynamically try to import and use a platform specific module.
 	try:
 		import al
 	except ImportError: