Use trainer type constants

include/constants/trainer_types.h

@@ -0,0 +1,8 @@
+#ifndef GUARD_CONSTANTS_TRAINER_TYPES_H
+#define GUARD_CONSTANTS_TRAINER_TYPES_H
+
+#define TRAINER_TYPE_NONE               0
+#define TRAINER_TYPE_NORMAL             1
+#define TRAINER_TYPE_SEE_ALL_DIRECTIONS 2
+
+#endif  // GUARD_CONSTANTS_TRAINER_TYPES_H