$amnt_tr = input_num('charge') + input_num('amount');
- if ($limit != null && floatcmp($limit, $amnt_tr) < 0)
+ if ($limit !== null && floatcmp($limit, $amnt_tr) < 0)
{
display_error(sprintf(_("The total bank amount exceeds allowed limit (%s) for source account."), price_format($limit)));
set_focus('amount');