Transaction.prototype.setData for verion set for 0 (zero) doesn't check version

[xantin]

node-zookeeper-client/lib/Transaction.js

Line 123 in 290e468

version = version || -1;

If in transaction call Transaction.prototype.setData = function (path, data, version)
and version has value 0, but an output is internally evaluated as -1 but should be 0 otherwise this use case doesn't work:

I have znode in zookeeper with version e.i. 33 and I will call aforementioned function
Transaction.prototype.setData = function (path, data, 0) and everything will be updated even though this should throw an Exception.BAD_VERSION because version 0 and 33 is different.

[xantin]

We could do this:

insted of
version = version || -1;
use

if (typeof version !== 'number') {
	version = -1;
}