Make town map limits more intuitive (#1185)

constants/landmark_constants.asm

@@ -1,7 +1,8 @@
 ; Landmarks indexes (see data/maps/landmarks.asm)
 	const_def
 	const LANDMARK_SPECIAL           ; 00
-; Johto landmarks
+
+DEF JOHTO_LANDMARK EQU const_value
 	const LANDMARK_NEW_BARK_TOWN     ; 01
 	const LANDMARK_ROUTE_29          ; 02
 	const LANDMARK_CHERRYGROVE_CITY  ; 03
@@ -48,6 +49,8 @@
 	const LANDMARK_DARK_CAVE         ; 2c
 	const LANDMARK_ROUTE_46          ; 2d
 	const LANDMARK_SILVER_CAVE       ; 2e
+DEF JOHTO_LANDMARK_LAST EQU const_value - 1
+
 DEF KANTO_LANDMARK EQU const_value
 	const LANDMARK_PALLET_TOWN       ; 2f
 	const LANDMARK_ROUTE_1           ; 30
@@ -97,7 +100,11 @@ DEF KANTO_LANDMARK EQU const_value
 	const LANDMARK_ROUTE_27          ; 5c
 	const LANDMARK_TOHJO_FALLS       ; 5d
 	const LANDMARK_ROUTE_28          ; 5e
+DEF KANTO_LANDMARK_LAST EQU const_value - 1
+
+DEF OTHER_LANDMARK EQU const_value
 	const LANDMARK_FAST_SHIP         ; 5f
+
 DEF NUM_LANDMARKS EQU const_value
 
 ; used in CaughtData

engine/pokegear/pokegear.asm

@@ -565,8 +565,8 @@ PokegearMap_KantoMap:
 	jr PokegearMap_ContinueMap
 
 PokegearMap_JohtoMap:
-	ld d, LANDMARK_SILVER_CAVE
-	ld e, LANDMARK_NEW_BARK_TOWN
+	ld d, JOHTO_LANDMARK_LAST
+	ld e, JOHTO_LANDMARK
 PokegearMap_ContinueMap:
 	ld hl, hJoyLast
 	ld a, [hl]
@@ -728,8 +728,8 @@ TownMap_GetKantoLandmarkLimits:
 	ld a, [wStatusFlags]
 	bit STATUSFLAGS_HALL_OF_FAME_F, a
 	jr z, .not_hof
-	ld d, LANDMARK_ROUTE_28
-	ld e, LANDMARK_PALLET_TOWN
+	ld d, KANTO_LANDMARK_LAST
+	ld e, KANTO_LANDMARK
 	ret
 
 .not_hof