lightbox toggles class "iframe" when showing just images

[sammik]

If using images, then data.iframe is undefined. Therefore lightbox.image.isIframe = ( data.iframe && !data.image ); is also undefined, so toggleClass switch doesn't work https://github.com/aino/galleria/blob/master/src/galleria.js#L2387
using !!data.iframe instead of data.iframe could fix it.
lightbox.image.isIframe = ( !!data.iframe && !data.image );
https://github.com/aino/galleria/blob/master/src/galleria.js#L2385

[b2point0h]

Having same issue here. It creates a huge area for the left/right side arrow holders which if user is trying to click the close button, it just moves forward to the next image.