Not showing the survey when user has no email

[backmeupplz]

It's an edge case, yet it's there. Survey isn't shown to users without email due to NSURL behaviour in WTRTrackingPixel.m:43. NSURL there simply doesn't recognize NSString URLs with <...>&email=&url=<...> where email argument is empty.

Can be fixed similarly to my fix here: backmeupplz@5d00d4e.

Thanks!

[backmeupplz]

OMG, no need to fix anything. I just had an invisible character in my app token for some reason. Maybe worth checking the token for unrecognized chars? NSURL fails if it encounters weird chars there