Verify data table sizes with table_width and assert_table_length macros

This was discussed in #706

It also uncovered some off-by-one issues with defining some constants.

A few structs now use rsreset/_RS to define their offset constants, as discussed in #739

data/events/bug_contest_flags.asm

@@ -1,5 +1,5 @@
 BugCatchingContestantEventFlagTable:
-; there are NUM_BUG_CONTESTANTS entries
+	table_width 2, BugCatchingContestantEventFlagTable
 	dw EVENT_BUG_CATCHING_CONTESTANT_1A
 	dw EVENT_BUG_CATCHING_CONTESTANT_2A
 	dw EVENT_BUG_CATCHING_CONTESTANT_3A
@@ -10,3 +10,4 @@ BugCatchingContestantEventFlagTable:
 	dw EVENT_BUG_CATCHING_CONTESTANT_8A
 	dw EVENT_BUG_CATCHING_CONTESTANT_9A
 	dw EVENT_BUG_CATCHING_CONTESTANT_10A
+	assert_table_length NUM_BUG_CONTESTANTS

data/events/bug_contest_winners.asm

@@ -1,5 +1,5 @@
 BugContestantPointers:
-; there are NUM_BUG_CONTESTANTS + 1 entries
+	table_width 2, BugContestantPointers
 	dw BugContestant_BugCatcherDon ; this reverts back to the player
 	dw BugContestant_BugCatcherDon
 	dw BugContestant_BugCatcherEd
@@ -11,6 +11,7 @@ BugContestantPointers:
 	dw BugContestant_BugCatcherJosh
 	dw BugContestant_YoungsterSamuel
 	dw BugContestant_SchoolboyKipp
+	assert_table_length NUM_BUG_CONTESTANTS + 1
 
 ; contestant format:
 ;   db class, id

data/events/elevator_floors.asm

@@ -1,5 +1,6 @@
 ElevatorFloorNames:
 ; entries correspond to FLOOR_* constants
+	table_width 2, ElevatorFloorNames
 	dw .B4F
 	dw .B3F
 	dw .B2F
@@ -16,6 +17,7 @@ ElevatorFloorNames:
 	dw ._10F
 	dw ._11F
 	dw .ROOF
+	assert_table_length NUM_FLOORS
 
 .B4F:  db "B4F@"
 .B3F:  db "B3F@"

data/events/engine_flags.asm

@@ -6,6 +6,7 @@ ENDM
 
 EngineFlags:
 ; entries correspond to ENGINE_* constants
+	table_width 3, EngineFlags
 
 	; pokegear
 	engine_flag wPokegearFlags, POKEGEAR_RADIO_CARD_F
@@ -197,3 +198,5 @@ EngineFlags:
 
 	engine_flag wSwarmFlags, SWARMFLAGS_DUNSPARCE_SWARM_F
 	engine_flag wSwarmFlags, SWARMFLAGS_YANMA_SWARM_F
+
+	assert_table_length NUM_ENGINE_FLAGS

data/events/happiness_changes.asm

@@ -1,6 +1,7 @@
 HappinessChanges:
 ; entries correspond to HAPPINESS_* constants
-; change if happiness < 100, change if happiness < 200, change otherwise
+	table_width 3, HappinessChanges
+	; change if happiness < 100, change if happiness < 200, change otherwise
 	db  +5,  +3,  +2 ; Gained a level
 	db  +5,  +3,  +2 ; Vitamin
 	db  +1,  +1,  +0 ; X Item
@@ -20,3 +21,4 @@ HappinessChanges:
 	db -15, -15, -20 ; Used Revival Herb (bitter)
 	db  +3,  +3,  +1 ; Grooming
 	db +10,  +6,  +4 ; Gained a level in the place where it was caught
+	assert_table_length NUM_HAPPINESS_CHANGES

data/events/npc_trades.asm

@@ -8,6 +8,7 @@ ENDM
 
 NPCTrades:
 ; entries correspond to NPCTRADE_* constants
+	table_width NPCTRADE_STRUCT_LENGTH, NPCTrades
 	npctrade TRADE_DIALOGSET_COLLECTOR, ABRA,       MACHOP,     "MUSCLE@@@@@", $37, $66, GOLD_BERRY,   37460, "MIKE@@@@@@@", TRADE_GENDER_EITHER
 	npctrade TRADE_DIALOGSET_COLLECTOR, BELLSPROUT, ONIX,       "ROCKY@@@@@@", $96, $66, BITTER_BERRY, 48926, "KYLE@@@@@@@", TRADE_GENDER_EITHER
 	npctrade TRADE_DIALOGSET_HAPPY,     KRABBY,     VOLTORB,    "VOLTY@@@@@@", $98, $88, PRZCUREBERRY, 29189, "TIM@@@@@@@@", TRADE_GENDER_EITHER
@@ -15,3 +16,4 @@ NPCTrades:
 	npctrade TRADE_DIALOGSET_NEWBIE,    HAUNTER,    XATU,       "PAUL@@@@@@@", $96, $86, MYSTERYBERRY, 15616, "CHRIS@@@@@@", TRADE_GENDER_EITHER
 	npctrade TRADE_DIALOGSET_GIRL,      CHANSEY,    AERODACTYL, "AEROY@@@@@@", $96, $66, GOLD_BERRY,   26491, "KIM@@@@@@@@", TRADE_GENDER_EITHER
 	npctrade TRADE_DIALOGSET_COLLECTOR, DUGTRIO,    MAGNETON,   "MAGGIE@@@@@", $96, $66, METAL_COAT,   50082, "FOREST@@@@@", TRADE_GENDER_EITHER
+	assert_table_length NUM_NPC_TRADES

data/events/odd_eggs.asm

@@ -1,9 +1,12 @@
+NUM_ODD_EGGS EQU 14
+
 prob: MACRO
 prob_total = prob_total + (\1)
 	dw prob_total * $ffff / 100
 ENDM
 
 OddEggProbabilities:
+	table_width 2, OddEggProbabilities
 prob_total = 0
 ; Pichu
 	prob 8
@@ -26,8 +29,10 @@ prob_total = 0
 ; Tyrogue
 	prob 10
 	prob 1
+	assert_table_length NUM_ODD_EGGS
 
 OddEggs:
+	table_width NICKNAMED_MON_STRUCT_LENGTH, OddEggs
 
 	db PICHU
 	db NO_ITEM
@@ -392,3 +397,5 @@ OddEggs:
 	bigdw 9 ; SAtk
 	bigdw 9 ; SDef
 	db "EGG@@@@@@@@"
+
+	assert_table_length NUM_ODD_EGGS