inputdialog broken in snapshot 81 82

[chemzqm]

I'm using https://github.com/othree/xml.vim. When using the latest version of macvim, there's no input field, it works fine when I use snapshot 77.
MacOS version is El Capitan.

[splhack]

How to reproduce

:let a = inputdialog('test')

[splhack]

thank you for the report