Issue with svn update 5739

This graph (Firewall Sessions) is added in observium on all my cisco devices. Even if we get during polling the following message: No Such Object available on this agent at this OID

Is it possible to change /opt/observium/includes/polling/graphs/cisco-firewall-mib.inc.php

from:
rrdtool_create($device, $rrd_filename, " DS:value:GAUGE:600:0:100000000 ");
rrdtool_update($device, $rrd_filename, "N:".$session_count);

to:

if (is_numeric($pppoe_session_count))

{ rrdtool_create($device, $rrd_filename, " DS:value:GAUGE:600:0:100000000 "); rrdtool_update($device, $rrd_filename, "N:".$session_count); }

I had the same problem with Cisco PPPoE sessions: http://jira.observium.org/browse/OBSERVIUM-951