bugfix: pagination bar has an empty page at the end

bugfix: pagination bar has an empty page at the end

There are a few pages where the pagination_bar() call produces an empty page
when the number of results is a multiple of the results per page.  Looking at
getnbpages() I see the right way to do it.  So I changed these few pages to
either use getnbpages() or calculate the number of pages the same way.