ivi-shell: fix TODO which expects only one screen in the system.

It just return the first screen found in screen list.

Signed-off-by: Nobuhiko Tanibata <NOBUHIKO_TANIBATA@xddp.denso.co.jp>
Reviewed-by: Pekka Paalanen <pekka.paalanen@collabora.co.uk>

ivi-shell/ivi-layout.c

@@ -1323,9 +1323,8 @@ ivi_layout_get_screen_from_id(uint32_t id_screen)
 	struct ivi_layout_screen *iviscrn = NULL;
 
 	wl_list_for_each(iviscrn, &layout->screen_list, link) {
-/* FIXME : select iviscrn from screen_list by id_screen */
-		return iviscrn;
-		break;
+		if (iviscrn->id_screen == id_screen)
+			return iviscrn;
 	}
 
 	return NULL;