0 shown as empty field in table view?

[ina.wels]

I have a form as a tableview. The fields on it get the format "#,###.00".

So for example
value | shown
73,8 | 73,80
51 | 51,00
13,23| 13,23
0 | 0,00

But for the value = 0 I don't want to show anything.
Is there an ability to control this?

[logicimpresa]

Hi, in field validation set to null.

[jcompagner]

there is a difference between 'null' and 0
Is the value really 0 ?