The product weight is not showing the amount

[YounesTimitar]

Hey

So I have one product with only 0.5  g (weight) but all the time it shows for 1g. Every other product the weight is over 1g and it shows correct but only for this one its 0.5g  but shows 1 g

I already asked my theme developer and they said that it has something to do with this code snippet a member of the shopify community changed for me. But they wont help me cause its not handle stuff like this.