giveitemfanfaremsg only uses callstd 9

asm/macros/event.inc

@@ -1435,10 +1435,10 @@
 	callstd \function
 	.endm
 
-	.macro giveitemfanfaremsg msg, item, amount=1, fanfare=MUS_FANFA1, function=9
+	.macro giveitemfanfaremsg msg, item, amount=1, fanfare=MUS_FANFA1
 	loadword 0, \msg
 	setorcopyvar 0x8000, \item
 	setorcopyvar 0x8001, \amount
 	setorcopyvar 0x8002, \fanfare
-	callstd \function
+	callstd 9
 	.endm