don't require login for logout page to avoid bogus next page redirect

journalmarks/journalmarks.py

@@ -130,9 +130,9 @@ def login():
 
 
 @journalmarks.route('/logout')
-@login_required
 def logout():
-    del session['username']
+    if 'username' in session:
+        del session['username']
     return render_template('logout.html')