runtime: fix typo in comment

R=golang-dev
CC=golang-dev
https://golang.org/cl/5529059

diff --git a/src/pkg/runtime/malloc.goc b/src/pkg/runtime/malloc.goc
index b71f5e433004cae7e7e947b2a660ff294650ec77..f1509cd9d91df496db9388d13cf236b5c4bd2910 100644 (file)
--- a/src/pkg/runtime/malloc.goc
+++ b/src/pkg/runtime/malloc.goc
@@ -115,7 +115,7 @@ runtime·free(void *v)
        if(v == nil)
                return;
        
-       // If you change this also change mgc0.c:/^sweepspan,
+       // If you change this also change mgc0.c:/^sweep,
        // which has a copy of the guts of free.
 
        if(m->mallocing)