Update n3ds.cmake

C-Stick mapping is incorrect for the 3ds platform.

Currently left/right is not functional,
up/down moves the cursor left/right.

This corrects the behavior.

Congrats on the new release!

CMake/platforms/n3ds.cmake

@@ -31,8 +31,8 @@ set(DEFAULT_HEIGHT 480)
 #SDL Joystick axis mapping (circle-pad/C-stick)
 set(JOY_AXIS_LEFTX 0)
 set(JOY_AXIS_LEFTY 1)
-set(JOY_AXIS_RIGHTX 3)
-set(JOY_AXIS_RIGHTY 4)
+set(JOY_AXIS_RIGHTX 2)
+set(JOY_AXIS_RIGHTY 3)
 #SDL Joystick hat mapping (D-pad)
 set(JOY_HAT_DPAD_UP_HAT 0)
 set(JOY_HAT_DPAD_RIGHT_HAT 0)