Fix typo

include/constants/battle_arena.h

@@ -20,7 +20,7 @@
 #define ARENA_RESULT_RUNNING     0 // For intermediate steps, when BattleArena_ShowJudgmentWindow should be called again immediately
 #define ARENA_RESULT_STEP_DONE   1 // A step has been completed, the script may advance to the next instruction
 #define ARENA_RESULT_PLAYER_WON  2
-#define AREAN_RESULT_PLAYER_LOST 3
-#define AREAN_RESULT_TIE         4
+#define ARENA_RESULT_PLAYER_LOST 3
+#define ARENA_RESULT_TIE         4
 
 #endif //GUARD_CONSTANTS_BATTLE_ARENA_H