Fixes bug where emails with empty Subject: are not fully fetched
Fixes bug where emails with empty Subject: are not fully fetched

aatishnn/geary,geekvigilante/geary,emersion/geary,emersion/geary,AtticHacker/geary,robol/geary,martinra/geary,tshikaboom/geary,tshikaboom/geary,abn/geary,mpdeimos/geary,githubnemo/geary,jimbonator/geary,kyoushuu/geary,robol/geary,AtticHacker/geary,glebihan/geary,AtticHacker/geary,githubnemo/geary,martinra/geary,tshikaboom/geary,emersion/geary,kyoushuu/geary,githubnemo/geary,glebihan/geary,robol/geary,jimbonator/geary,mjog/geary,jimbonator/geary,rschroll/geary,aatishnn/geary,MohamedIM/geary-unofficial,mjog/geary,mjog/geary,rschroll/geary,aatishnn/geary,kpiwko/geary,glebihan/geary,martinra/geary