From bfdfd654bfd6eb7cfa4ecd6b96628e3e6557b232 Mon Sep 17 00:00:00 2001
From: trav90 <travawine@palemoon.org>
Date: Sat, 18 Aug 2018 15:12:00 -0500
Subject: [PATCH] memset only the underlying vector from the Array container

---
 dom/bindings/BindingUtils.h | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/dom/bindings/BindingUtils.h b/dom/bindings/BindingUtils.h
index 3e58390c9f..24b47a545d 100644
--- a/dom/bindings/BindingUtils.h
+++ b/dom/bindings/BindingUtils.h
@@ -515,7 +515,7 @@ class ProtoAndIfaceCache
   {
   public:
     PageTableCache() {
-      memset(&mPages, 0, sizeof(mPages));
+      memset(mPages.begin(), 0, sizeof(mPages));
     }
 
     ~PageTableCache() {