BUG #1039180 - misconfiguration in horizon settings leads to stack trace

Change-Id: I328df7dc91bde723acb0dcd6fa0e8986255b9c50
diff --git a/AUTHORS b/AUTHORS
index 4f771ce..dde2c7b 100644
--- a/AUTHORS
+++ b/AUTHORS
@@ -29,6 +29,7 @@
 Justin Shepherd <galstrom21@gmail.com>
 Ken Pepple <ken.pepple@rabbityard.com>
 Kiall Mac Innes <kiall@managedit.ie>
+Matt Joyce <matt.joyce@cloudscaling.com>
 Osamu Habuka <xiu.yushen@gmail.com>
 Russell Bryant <rbryant@redhat.com>
 Scott Moser <smoser@ubuntu.com>