added os check

includes/discovery/power/extreme.inc.php

@@ -2,6 +2,7 @@
 
 echo(" EXTREME-BASE-MIB ");
 
+if ($device['os'] == 'xos') {
     // Power Usage
     $descr   = "Power Usage";
     $oid     = "1.3.6.1.4.1.1916.1.1.1.40.1.0"; // extremeSystemPowerUsage
@@ -12,5 +13,5 @@ $value	 = ($value / $divisor); // Nasty hack to divide the first value by 1000 s
     if (is_numeric($value)) {
         discover_sensor($valid['sensor'], 'power', $device, $oid, '1', 'extreme-power', $descr, $divisor, 1, null, null, null, null, $value); // No limits have been specified since all equipment is different and will use different amount of Watts
     }
-
+}
 // EOF