Fix segfault on g. when last modification position past buffer end
Fix segfault on g. when last modification position past buffer end

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