multchoicebox returns None instead of empty list when I select no item

[jozefwiora]

I have easygui version 0.98.1 installed in Windows.
I need to distinguish between cancel and selected no items.
I recognized that in case deselection of all items, the function returns None.
In my opinion, it should be an empty list [].

[westin123]

I just ran into this issue as well. I agree, it should return an empty list.

[westin123]

I made PR #210 for this.