runtime: fix set and not used in chan.c

R=rsc
CC=golang-dev
https://golang.org/cl/4416042

diff --git a/src/pkg/runtime/chan.c b/src/pkg/runtime/chan.c
index 8c45b076d0c8de3c65c72dbd6feb8eaf543389b0..2fab9e2161e72886ba94bf92f3e07e6a148a3fc4 100644 (file)
--- a/src/pkg/runtime/chan.c
+++ b/src/pkg/runtime/chan.c
@@ -121,7 +121,6 @@ runtime·makechan_c(Type *elem, int64 hint)
        by = runtime·mal(n + hint*elem->size);
 
        c = (Hchan*)by;
-       by += n;
        runtime·addfinalizer(c, destroychan, 0);
 
        c->elemsize = elem->size;