Caller ID Superfecta

By looking at the code of caller_id.php I was wondering if the following could not create a bug:

the CID provided by asterisk in the http request [thenumber] is used to match the channel used (via asterisk manager) to find the DID.

However, before doing the match, we are transforming the number with
$thenumber_orig = ereg_replace('[^0-9]+', '', $thenumber_orig);

In some cases, where the CID did contain letters, then the match with a channel will not work anymore.

If I'm right, I would suggest the following mod:

remove the line $thenumber_orig = ereg_replace('[^0-9]+', '', $thenumber_orig);

and change the line $thenumber = $thenumber_orig;
by
$thenumber = ereg_replace('[^0-9]+', '', $thenumber_orig);

Please advise if this indeed is a problem or not and if I should submit this patch.