fix shell_eval when no buffer in context
fix shell_eval when no buffer in context

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