Consistent labels for each nickname in RAM

constants/npc_trade_constants.asm

@@ -1,15 +1,15 @@
 ; npctrade struct members (see data/events/npc_trades.asm)
 rsreset
-NPCTRADE_DIALOG  rb
-NPCTRADE_GIVEMON rb
-NPCTRADE_GETMON  rb
-NPCTRADE_NICK    rb MON_NAME_LENGTH
-NPCTRADE_DVS     rw
-NPCTRADE_ITEM    rb
-NPCTRADE_OT_ID   rw
-NPCTRADE_OT_NAME rb NAME_LENGTH
-NPCTRADE_GENDER  rb
-NPCTRADE_PADDING rb
+NPCTRADE_DIALOG   rb
+NPCTRADE_GIVEMON  rb
+NPCTRADE_GETMON   rb
+NPCTRADE_NICKNAME rb MON_NAME_LENGTH
+NPCTRADE_DVS      rw
+NPCTRADE_ITEM     rb
+NPCTRADE_OT_ID    rw
+NPCTRADE_OT_NAME  rb NAME_LENGTH
+NPCTRADE_GENDER   rb
+                  rb_skip
 NPCTRADE_STRUCT_LENGTH EQU _RS
 
 ; NPCTrades indexes (see data/events/npc_trades.asm)