ByteBuffer.writeVarint64 truncating value to 32 bits.

[cawilson]

Whilst testing the new version, I've noticed that when a number that is greater than 32 bits is written as a Varint64, the code is truncating the value to 32 bits.

ByteBuffer.prototype.writeVarint64 = function(value, offset) {
    ...
    if (!this.noAssert) {
        if (typeof value === 'number' && value % 1 === 0)
            value |= 0; // This is truncating the value to 32 bits.
        ...
    }
    ...
};

I have tested this in IE 11, Chrome 35 and FF 31 with the same result.

An example is:

var value = 13270440001;
value |= 0; // value is now: 385538113

I've also noticed that this same operation is used a few times throughout the new version and I'm wondering if similar issues will arise. I can see that the resize method performs the same operation on the capacity and thus this would artificially limit the capacity.