Update the code to better reflect recommended style:

Use != instead of <> since <> is documented as "obsolescent".
Use "is" and "is not" when comparing with None or type objects.
diff --git a/Lib/sunaudio.py b/Lib/sunaudio.py
index cbd17d2..87dc6ee 100644
--- a/Lib/sunaudio.py
+++ b/Lib/sunaudio.py
@@ -13,7 +13,7 @@
 
 def gethdr(fp):
 	"""Read a sound header from an open file."""
-	if fp.read(4) <> MAGIC:
+	if fp.read(4) != MAGIC:
 		raise error, 'gethdr: bad magic word'
 	hdr_size = get_long_be(fp.read(4))
 	data_size = get_long_be(fp.read(4))