Display next slide ID as END instead of -1.0

[mathjazz]

Currently, onstage.html displays the last slide number as -1.0.

This is a fix which will display END instead of -1.0 as the last slide's number.

[hsablonniere]

Thanks. I'm wondering if a Number comparison wouldn't be better than the minus - detection ?

Something like this : $("#nextslideidx").innerHTML = +argv[1] < 0 ? "END" : argv[1];

[mathjazz]

I agree, your solution looks more elegant.

[hsablonniere]

Thanks. If you feel like keeping my solution. Feel free to update (ammend) your commit, I'll merge it right away...

[mathjazz]

Done.