Fix page count for single pages and last page for Moebooru (fix #1280)
Fix page count for single pages and last page for Moebooru (fix #1280)

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