Fix nullptr crash on android

nullcheck the device coming back from InputDevice.getDevice(deviceId) in new code added to sdlactivity.onkey.


java.lang.NullPointerException:
  at org.libsdl.app.SDLSurface.onKey (SDLActivity.java:1793)
  at android.view.View.dispatchKeyEvent (View.java:13321)
  at android.view.ViewGroup.dispatchKeyEvent (ViewGroup.java:1912)
  at android.view.ViewGroup.dispatchKeyEvent (ViewGroup.java:1912)
  at android.view.ViewGroup.dispatchKeyEvent (ViewGroup.java:1912)
  at android.view.ViewGroup.dispatchKeyEvent (ViewGroup.java:1912)
  at com.android.internal.policy.DecorView.superDispatchKeyEvent (DecorView.java:685)
  at com.android.internal.policy.PhoneWindow.superDispatchKeyEvent (PhoneWindow.java:1869)
  at android.app.Activity.dispatchKeyEvent (Activity.java:3447)
  at org.libsdl.app.SDLActivity.dispatchKeyEvent (SDLActivity.java:496)

@dang @saml @dave
1 file changed