fix: correctly load twitch badges in highlights page

[pajlada]

Broken state:

Fixed state after this PR:

[pajlada]

[kornes]

in what way #3736 broke it?
imageCount() == 0 check was present before my PR, so unless it reports -1 now (which is error value we probably shouldn't ignore), it was broken before

[pajlada]

in what way #3736 broke it? imageCount() == 0 check was present before my PR, so unless it reports -1 now (which is error value we probably shouldn't ignore), it was broken before

My bad, I checked the diff too lazily then