Use MAX_MON_MOVES constants

include/data.h

@@ -34,7 +34,7 @@ struct TrainerMonNoItemCustomMoves
     u16 iv;
     u8 lvl;
     u16 species;
-    u16 moves[4];
+    u16 moves[MAX_MON_MOVES];
 };
 
 struct TrainerMonItemCustomMoves
@@ -43,7 +43,7 @@ struct TrainerMonItemCustomMoves
     u8 lvl;
     u16 species;
     u16 heldItem;
-    u16 moves[4];
+    u16 moves[MAX_MON_MOVES];
 };
 
 union TrainerMonPtr