rpclient: GetBlockVerboseTx argument verbosity numeric

[romanornr]

I tried GetBlockVerboseTx(blockhash)

I can't put in a second argument so I get the error that I am missing a verbosity number 0, 1 or 2.

If verbosity is 0, returns a string that is serialized, hex-encoded data for block 'hash'.
If verbosity is 1, returns an Object with information about block <hash>.
If verbosity is 2, returns an Object with information about block <hash> and information about each transaction. 

Arguments:
1. "blockhash"          (string, required) The block hash
2. verbosity              (numeric, optional, default=1) 0 for hex encoded data, 1 for a json object, and 2 for json object with transaction data

Result (for verbosity = 0):
"data"             (string) A string that is serialized, hex-encoded data for block 'hash'.```

Unsure if I do something wrong. (Using Core 0.15 with RPC as backend)