[Bug] CallFunction method accepts amount > 0 only

[claytonneal]

in Clause.ts

To me amount (which i assume goes as value in the tx) can be = 0
imagine i call a contract function that +1 to a number stored on chain
in this case value = 0, and data = encoded function name

• Fix it on 1.0.0
• Cherrypick the change to main