/process_receipt/: Catch 0.00 net and gross values.
/process_receipt/: Catch 0.00 net and gross values.

Net and Gross should never have a 0.00 amount.

This also catches when nothing has been entered into these fields.

Signed-off-by: Andrew Clayton <02e0a999c50b1f88df7a8f5a04e1b76b35ea6a88@opentechlabs.co.uk>

ac000/receiptomatic