Add workaround for issue #13
Add workaround for issue #13

Just use last videoinput device for now.

Schibum/barcode.js,Schibum/barcode.js,dsanders11/barcode.js,dsanders11/barcode.js,Schibum/barcode.js,dsanders11/barcode.js,Schibum/barcode.js,dsanders11/barcode.js