runtime: fix plan9 build

R=golang-dev, r
CC=golang-dev
https://golang.org/cl/12986043

diff --git a/src/pkg/runtime/mem_plan9.c b/src/pkg/runtime/mem_plan9.c
index 3aa16eb3a639195be540f6fc25dc8ba683363391..f443b640e7eeacb4343913b58cc81f24bccb8b46 100644 (file)
--- a/src/pkg/runtime/mem_plan9.c
+++ b/src/pkg/runtime/mem_plan9.c
@@ -56,7 +56,7 @@ runtime·SysUnused(void *v, uintptr nbytes)
 }
 
 void
-runtime·SysUsed(void *v, uintptr n)
+runtime·SysUsed(void *v, uintptr nbytes)
 {
        USED(v, nbytes);
 }