Added a new unused key code from Android 4.4 (API 19).
diff --git a/src/video/android/SDL_androidkeyboard.c b/src/video/android/SDL_androidkeyboard.c
index 5381de6..97152b5 100644
--- a/src/video/android/SDL_androidkeyboard.c
+++ b/src/video/android/SDL_androidkeyboard.c
@@ -262,6 +262,7 @@ static SDL_Scancode Android_Keycodes[] = {
SDL_SCANCODE_UNKNOWN, /* AKEYCODE_ASSIST */
SDL_SCANCODE_BRIGHTNESSDOWN, /* AKEYCODE_BRIGHTNESS_DOWN */
SDL_SCANCODE_BRIGHTNESSUP, /* AKEYCODE_BRIGHTNESS_UP */
+ SDL_SCANCODE_UNKNOWN, /* AKEYCODE_MEDIA_AUDIO_TRACK */
};
static SDL_Scancode