Add forgotten flag to deploy script

I should maybe write tests for even that?

deploy.sh

@@ -27,7 +27,7 @@ currentbranch="$(git branch --format '%(refname:short)')"
 
 # If we are not on target branch, switch and run again
 if test "$currentbranch" '!=' "$branch"; then
-	exec /bin/sh -eu "git checkout $branch && exec $0"
+	exec /bin/sh -eu -c "git checkout $branch && exec $0"
 fi
 
 echo "Deploying branch $branch"