avoid some (look to be harmless) warnings:
authorivan <ivan>
Thu, 8 Oct 2009 05:44:40 +0000 (05:44 +0000)
committerivan <ivan>
Thu, 8 Oct 2009 05:44:40 +0000 (05:44 +0000)
commitbb8d487a57a75d8d55c89c5f7cb593c4bfeace85
treed7a8094b1af886f8674ada1c4d8e05d646a43673
parent033f562f4e0b2a1bacf096f3e8f8c99590469dcf
avoid some (look to be harmless) warnings:

Argument "" isn't numeric in sprintf at /usr/local/share/perl/5.10.0/FS/cust_bill.pm line 2358.

Argument "" isn't numeric in subtraction (-) at /usr/local/share/perl/5.10.0/FS/cust_bill.pm line 2359.

Argument "" isn't numeric in addition (+) at /usr/local/share/perl/5.10.0/FS/cust_main.pm line 2788.
FS/FS/cust_bill.pm
FS/FS/cust_main.pm