Add assertions to some more tables

engine/pokemon/mail_2.asm

@@ -11,6 +11,7 @@
 	const BLUESKY_MAIL_INDEX ; 7
 	const MUSIC_MAIL_INDEX   ; 8
 	const MIRAGE_MAIL_INDEX  ; 9
+NUM_MAIL EQU const_value
 
 ReadPartyMonMail:
 	ld a, [wCurPartyMon]
@@ -126,6 +127,7 @@ ReadAnyMail:
 
 MailGFXPointers:
 ; entries correspond to *MAIL_INDEX constants
+	table_width 3, MailGFXPointers
 	dbw FLOWER_MAIL,  LoadFlowerMailGFX
 	dbw SURF_MAIL,    LoadSurfMailGFX
 	dbw LITEBLUEMAIL, LoadLiteBlueMailGFX
@@ -136,6 +138,7 @@ MailGFXPointers:
 	dbw BLUESKY_MAIL, LoadBlueSkyMailGFX
 	dbw MUSIC_MAIL,   LoadMusicMailGFX
 	dbw MIRAGE_MAIL,  LoadMirageMailGFX
+	assert_table_length NUM_MAIL
 	db -1 ; end
 
 LoadSurfMailGFX:

engine/pokemon/stats_screen.asm

@@ -570,9 +570,11 @@ StatsScreen_LoadGFX:
 
 .Jumptable:
 ; entries correspond to *_PAGE constants
+	table_width 2, StatsScreen_LoadGFX.Jumptable
 	dw LoadPinkPage
 	dw LoadGreenPage
 	dw LoadBluePage
+	assert_table_length NUM_STAT_PAGES
 
 LoadPinkPage:
 	hlcoord 0, 9