Fix split selecting the buffer end
Fix split selecting the buffer end

Fixes #241

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