From 7775d6d07e0e8155cd7844e26fe8542948dd2651 Mon Sep 17 00:00:00 2001
From: laf <neil@lathwood.co.uk>
Date: Mon, 26 Oct 2015 20:43:14 +0000
Subject: [PATCH] Changed from is_numeric to empty as variables can now contain
 non-numeric

---
 html/pages/devices.inc.php | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/html/pages/devices.inc.php b/html/pages/devices.inc.php
index 5692a283f..10b000fcc 100644
--- a/html/pages/devices.inc.php
+++ b/html/pages/devices.inc.php
@@ -91,13 +91,13 @@ list($format, $subformat) = explode("_", $vars['format'], 2);
 
 if($format == "graph") {
 
-    if (!is_numeric($vars['from'])) {
+    if (empty($vars['from'])) {
         $graph_array['from'] = $config['time']['day'];
     }
     else {
         $graph_array['from'] = $vars['from'];
     }
-    if (!is_numeric($vars['to'])) {
+    if (empty($vars['to'])) {
         $graph_array['to'] = $config['time']['now'];
     }
     else {