package/tvheadend: fix startup script

Obvious fix to the startup script: 'restart' is 'stop+start',
not 'stop+stop'.

Signed-off-by: "Yann E. MORIN" <yann.morin.1998@free.fr>
Signed-off-by: Peter Korsgaard <jacmet@sunsite.dk>

package/tvheadend/S99tvheadend

@@ -43,7 +43,7 @@ case "$1" in
     restart|force-reload)
         "${0}" stop
         sleep 2
-        "${0}" stop
+        "${0}" start
         ;;
     *)
         echo "Usage: $SCRIPTNAME {start|stop|restart|force-reload}" >&2