Network - Navigation Zoom is broken (4.18)

[Kokozzi]

After #2377 commit to 4.18 Zoom events for Navigation at Network module are broken. Example of it is active at official example page - http://visjs.org/examples/network/other/navigation.html

Uncaught ReferenceError: pointer is not defined - when trying to zoom in or zoom out with help of bottom buttons.

[Tooa]

I can confirm this issue. There is no pointer in the scope of the button events :/

@yoavdamri can you take a look at this?

[yoavdamri]

@Tooa, I saw it, in this case i can pass null (since the pointer is not relevant) or the translation x, y.
what do you think?

[Tooa]

Thanks for reporting this issue. Fixed by @CapitanMorgan with #2615