runtime: fix compiler warnings

R=golang-dev, gri
CC=golang-dev
https://golang.org/cl/5642068

diff --git a/src/pkg/runtime/malloc.goc b/src/pkg/runtime/malloc.goc
index 885ab0395a6caff3f1e3291cbf69905b3bc4aeff..4d5c80c72718b19958a2b8f1280915b02700387f 100644 (file)
--- a/src/pkg/runtime/malloc.goc
+++ b/src/pkg/runtime/malloc.goc
@@ -262,6 +262,13 @@ runtime·mallocinit(void)
        byte *want;
 
        p = nil;
+       arena_size = 0;
+       bitmap_size = 0;
+       
+       // for 64-bit build
+       USED(p);
+       USED(arena_size);
+       USED(bitmap_size);
 
        runtime·InitSizes();