Mint fix

[DrPresident]

Fixed some things in mint, I don't think anything was really broken but its slightly cheaper now and removed some redundant code

[FloppyDisck]

Duplicate code, can be reduced to

        // Try to burn
        if let Some(token_config) = &burn_asset.asset.token_config {
            if token_config.burn_enabled {
                messages.push(burn_msg(
                    burn_amount,
                    None,
                    None,
                    256,
                    burn_asset.asset.contract.code_hash.clone(),
                    burn_asset.asset.contract.address.clone(),
                )?);
            }
        } else if let Some(recipient) = config.secondary_burn {
            messages.push(send_msg(
                recipient,
                burn_amount,
                None,
                None,
                None,
                1,
                burn_asset.asset.contract.code_hash.clone(),
                burn_asset.asset.contract.address.clone(),
            )?);
        }
    }```

[DrPresident]

It isn't duplicated, there are 3 cases to be accounted for.

if has_token_config() {
   if burn_enabled => do_burn()
   else => do_secondary_burn()
}
else if no_token_confg() {
    do_secondary_burn()
}