Firefox 16.0.1 problem deltaX, deltaY missing

[player259]

Problem with FF 16.0.1 version, deltaX and deltaY are NaN in mousewheel callback.
orgEvent doesn't have this values and defaults should be provided.
I've resolved this issue adding else statements like this:

// Webkit
if ( orgEvent.wheelDeltaY !== undefined ) { deltaY = orgEvent.wheelDeltaY; }
else deltaY = delta;
if ( orgEvent.wheelDeltaX !== undefined ) { deltaX = orgEvent.wheelDeltaX * -1; }
else deltaX = delta;

I don't know if this known FF problem or my portable FF issue, but the code above works fine.

[brandonaaron]

Closing in favor of #74.