Fix infinite scrolling when total page count is unknown (fix #1728)
Fix infinite scrolling when total page count is unknown (fix #1728)

Bionus/imgbrd-grabber,Bionus/imgbrd-grabber,Bionus/imgbrd-grabber,Bionus/imgbrd-grabber,Bionus/imgbrd-grabber,Bionus/imgbrd-grabber