I would recommend to following change to not be sending 0 amount value accross Zetachain protocol which can happen if the amount of value sent is exactly the same as fees, granted that should be rare, which is why this is a Low severity. PayGasInZetaAndUpdateCctx, PayGasNativeAndUpdateCctx and PayGasInERC20AndUpdateCctx should use GTE instead of GT.
https://github.com/code-423n4/2023-11-zetachain/blob/main/repos/node/x/crosschain/keeper/gas_payment.go#L109
https://github.com/code-423n4/2023-11-zetachain/blob/main/repos/node/x/crosschain/keeper/gas_payment.go#L171
https://github.com/code-423n4/2023-11-zetachain/blob/main/repos/node/x/crosschain/keeper/gas_payment.go#L299
