handler logout fix for expired sessions

py/webnotes/handler.py

@@ -35,7 +35,7 @@ def runserverobj(arg=None):
 	import webnotes.widgets.form.run_method
 	webnotes.widgets.form.run_method.runserverobj()
 
-@webnotes.whitelist()
+@webnotes.whitelist(allow_guest=True)
 def logout():
 	webnotes.login_manager.logout()
 
@@ -339,4 +339,4 @@ def compressBuf(buf):
 	zfile = gzip.GzipFile(mode = 'wb',  fileobj = zbuf, compresslevel = 5)
 	zfile.write(buf)
 	zfile.close()
-	return zbuf.getvalue()
+	return zbuf.getvalue()