tools: Add missing enums to switch statement

Signed-off-by: Donald Sharp <sharpd@nvidia.com>

tools/start-stop-daemon.c

@@ -885,7 +885,7 @@ static int run_stop_schedule(void)
 					      strerror(errno));
 			}
 
-		default:
+		case sched_forever:
 			assert(!"schedule[].type value must be valid");
 		}