Fix incorrect high/low gear in joystick

Change-Id: I77710d2935a3e0a1d8a97da9ccbc21fa171ab31d
diff --git a/y2014_bot3/joystick_reader.cc b/y2014_bot3/joystick_reader.cc
index 3e6e3e2..6dfcbb4 100644
--- a/y2014_bot3/joystick_reader.cc
+++ b/y2014_bot3/joystick_reader.cc
@@ -30,7 +30,7 @@
 
 // Joystick & button addresses.
 const JoystickAxis kSteeringWheel(1, 1), kDriveThrottle(2, 2);
-const ButtonLocation kShiftHigh(2, 1), kShiftLow(2, 3);
+const ButtonLocation kShiftHigh(2, 3), kShiftLow(2, 1);
 const ButtonLocation kQuickTurn(1, 5);
 
 const ButtonLocation kFrontRollersIn(3, 8);
@@ -75,11 +75,11 @@
       LOG(WARNING, "sending stick values failed\n");
     }
 
-    if (data.PosEdge(kShiftHigh)) {
+    if (data.PosEdge(kShiftLow)) {
       is_high_gear_ = false;
     }
 
-    if (data.PosEdge(kShiftLow)) {
+    if (data.PosEdge(kShiftHigh)) {
       is_high_gear_ = true;
     }
   }