rawissueasset doesn't allow asset_amount of zero while issueasset does

[wintercooled]

elements 0.18.1.9

rawissueasset doesn't allow asset_amount of zero:

Invalid parameter, asset_amount must be positive

Whereas this is ok using issueasset. If you use issueasset 0 1 you get zero asset amount and 1 reissuance token and then you can effectively reissue the asset into existence.

Would be good if you could do the same with rawissueasset for cases where people want to issue an asset and want to know the asset id but do not know the amount they need yet.