Some frontier field_specials documentation

include/field_specials.h

@@ -20,7 +20,7 @@ bool32 ShouldDoRivalRayquazaCall(void);
 bool32 CountSSTidalStep(u16 delta);
 u8 GetSSTidalLocation(s8 *mapGroup, s8 *mapNum, s16 *x, s16 *y);
 void ShowScrollableMultichoice(void);
-void sub_813A878(u8 a0);
+void FrontierGamblerSetWonOrLost(bool8 won);
 u8 sub_813BADC(u8 a0);
 bool8 InPokemonCenter(void);
 void SetShoalItemFlag(u16 v0);