Application crash if the Image has no URL

[Berovowilare]

Hello

There are some images on the web with no specific URL. If we try to check such images the application crashes.

Thanks for the fix.

[lapcat]

This can be fixed by checking for nil here instead of force unwrapping.

Safari-Reverse-Image-Search/Safari Reverse Image Search Extension/SafariExtensionHandler.swift

Line 23 in 201040f

if (userInfo!["isImage"] as! String == "IMG"){