filter/count: Fix alignment on 32-bit systems.

filter/count/mc.go

Index: filter/count/mc.go
diff --git a/filter/count/mc.go b/filter/count/mc.go
index 1000140890092084001d18c9cf2eea496baeaf95..7560ad13707b2ec79e0d5d21e55afd0e6c2379d9 100644
--- a/filter/count/mc.go
+++ b/filter/count/mc.go
@@ -71,6 +71,16 @@ func (m *mcCounter) Stats() (*mc.Statistics, error) {
 // FilterMC installs a counter Memcache filter in the context.
 func FilterMC(c context.Context) (context.Context, *MCCounter) {
 	state := &MCCounter{}
+	state.NewItem.init()
+	state.AddMulti.init()
+	state.SetMulti.init()
+	state.GetMulti.init()
+	state.DeleteMulti.init()
+	state.CompareAndSwapMulti.init()
+	state.Increment.init()
+	state.Flush.init()
+	state.Stats.init()
+
 	return mc.AddRawFilters(c, func(ic context.Context, mc mc.RawInterface) mc.RawInterface {
 		return &mcCounter{state, mc}
 	}), state