rgbds supports 'X - 1' instead of 'X + -1'

macros/data.asm

@@ -51,7 +51,7 @@ dx: MACRO
 x = 8 * ((\1) - 1)
 rept \1
 	db ((\2) >> x) & $ff
-x = x + -8
+x = x - 8
 endr
 ENDM
 

macros/scripts/gfx_anims.asm

@@ -4,7 +4,7 @@ frame: MACRO
 	db \1
 x = \2
 if _NARG > 2
-rept _NARG + -2
+rept _NARG - 2
 x = x | (1 << (\3 + 1))
 	shift
 endr

macros/wram.asm

@@ -106,7 +106,7 @@ box: MACRO
 \1Species::         ds MONS_PER_BOX + 1
 \1Mons::
 \1Mon1::            box_struct \1Mon1
-\1Mon2::            ds BOXMON_STRUCT_LENGTH * (MONS_PER_BOX + -1)
+\1Mon2::            ds BOXMON_STRUCT_LENGTH * (MONS_PER_BOX - 1)
 \1MonOT::           ds NAME_LENGTH * MONS_PER_BOX
 \1MonNicknames::    ds MON_NAME_LENGTH * MONS_PER_BOX
 \1MonNicknamesEnd::
@@ -171,7 +171,7 @@ channel_struct: MACRO
 ENDM
 
 battle_tower_struct: MACRO
-\1Name:: ds NAME_LENGTH + -1
+\1Name:: ds NAME_LENGTH - 1
 \1TrainerClass:: ds 1
 \1Mon1:: party_struct \1Mon1
 \1Mon1Name:: ds MON_NAME_LENGTH
@@ -217,7 +217,7 @@ hof_mon: MACRO
 \1ID::       dw
 \1DVs::      dw
 \1Level::    db
-\1Nickname:: ds MON_NAME_LENGTH + -1
+\1Nickname:: ds MON_NAME_LENGTH - 1
 \1End::
 ENDM
 
@@ -233,7 +233,7 @@ hall_of_fame: MACRO
 ENDM
 
 link_battle_record: MACRO
-\1Name::   ds NAME_LENGTH + -1
+\1Name::   ds NAME_LENGTH - 1
 \1ID::     dw
 \1Wins::   dw
 \1Losses:: dw