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)
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.


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