From 662c19568e8cf6beed4fb1aa25b930e5269239ed Mon Sep 17 00:00:00 2001
From: Oliver Jowett <oliver@mutability.co.uk>
Date: Sat, 17 Sep 2016 13:32:34 +0100
Subject: [PATCH] Don't try to compute registrations on non-hex addresses (e.g.
 non-icao: ~123456)

---
 public_html/registrations.js | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/public_html/registrations.js b/public_html/registrations.js
index fc1102d..1fab589 100644
--- a/public_html/registrations.js
+++ b/public_html/registrations.js
@@ -107,6 +107,9 @@ registration_from_hexid = (function () {
 
         function lookup(hexid) {
                 var hexid = +("0x" + hexid);
+                if (isNaN(hexid)) {
+                        return null;
+                }
 
                 reg = n_reg(hexid);
                 if (reg)