fix debian sysvinit script fails to restart docker daemon when stopped
Fixes:
@@ -131,7 +131,7 @@ case "$1" in
restart)
check_init
fail_unless_root
- docker_pid=$(cat "$DOCKER_SSD_PIDFILE" 2> /dev/null)
+ docker_pid=$(cat "$DOCKER_SSD_PIDFILE" 2> /dev/null || true)
[ -n "$docker_pid" ] \
&& ps -p $docker_pid > /dev/null 2>&1 \
&& $0 stop
