Fix buffer iterator_at_line_{begin,end}(LineCount)
Fix buffer iterator_at_line_{begin,end}(LineCount)

jkonecny12/kakoune,alexherbo2/kakoune,lenormf/kakoune,lenormf/kakoune,Asenar/kakoune,jjthrash/kakoune,Asenar/kakoune,lenormf/kakoune,danr/kakoune,flavius/kakoune,Somasis/kakoune,jjthrash/kakoune,mawww/kakoune,alexherbo2/kakoune,elegios/kakoune,occivink/kakoune,jkonecny12/kakoune,alexherbo2/kakoune,rstacruz/kakoune,elegios/kakoune,casimir/kakoune,rstacruz/kakoune,ekie/kakoune,zakgreant/kakoune,alpha123/kakoune,elegios/kakoune,rstacruz/kakoune,xificurC/kakoune,zakgreant/kakoune,casimir/kakoune,danr/kakoune,rstacruz/kakoune,danielma/kakoune,danielma/kakoune,danielma/kakoune,Asenar/kakoune,zakgreant/kakoune,occivink/kakoune,alpha123/kakoune,jjthrash/kakoune,xificurC/kakoune,danr/kakoune,occivink/kakoune,ekie/kakoune,mawww/kakoune,Somasis/kakoune,jjthrash/kakoune,casimir/kakoune,ekie/kakoune,xificurC/kakoune,occivink/kakoune,danielma/kakoune,casimir/kakoune,elegios/kakoune,Somasis/kakoune,jkonecny12/kakoune,xificurC/kakoune,zakgreant/kakoune,danr/kakoune,alpha123/kakoune,flavius/kakoune,ekie/kakoune,flavius/kakoune,lenormf/kakoune,Asenar/kakoune,flavius/kakoune,mawww/kakoune,Somasis/kakoune,alexherbo2/kakoune,alpha123/kakoune,jkonecny12/kakoune,mawww/kakoune