Update ARchitectWindow.js

Dear Wikitude,
I noticed that a little issue occurs every time ARchitectWindow.js is loaded. In fact no POIs are loaded because user current position is missing. 
If you want to check it out here you should find a little screenshot.(https://www.dropbox.com/s/1zp3hd7zt9zwcqx/image.jpeg?dl=0).

Giacomo.