Fix joystick input to read button 16

Change-Id: I6cf35117fc31a750664b53c23794bc071a5e98db
diff --git a/aos/input/driver_station_data.cc b/aos/input/driver_station_data.cc
index fd17d77..8898ca1 100644
--- a/aos/input/driver_station_data.cc
+++ b/aos/input/driver_station_data.cc
@@ -19,7 +19,7 @@
       location.joystick() > static_cast<int>(values.joysticks.size())) {
     return false;
   }
-  if (location.number() < 0 || location.number() >= 16) {
+  if (location.number() <= 0 || location.number() > 16) {
     return false;
   }
   return values.joysticks[location.joystick() - 1].buttons &