Trainer tower sets to C

include/constants/trainer_tower.h

@@ -4,6 +4,7 @@
 #define CHALLENGE_TYPE_SINGLE     0
 #define CHALLENGE_TYPE_DOUBLE     1
 #define CHALLENGE_TYPE_KNOCKOUT   2
+#define CHALLENGE_TYPE_MIXED      3
 // Mixed challenges use one of the above 3 for each floor
 
 #define CHALLENGE_STATUS_LOST     0