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/plat-irix5/panel.py b/Lib/plat-irix5/panel.py
index 629bee5..f8388c6 100755
--- a/Lib/plat-irix5/panel.py
+++ b/Lib/plat-irix5/panel.py
@@ -207,7 +207,7 @@
 	#
 	# Sanity check
 	#
-	if (not descr) or descr[0] <> 'panel':
+	if (not descr) or descr[0] != 'panel':
 		raise panel_error, 'panel description must start with "panel"'
 	#
 	if debug: show_panel('', descr)