From 08fdb351d15169c3717e9bfa7ebdbf4266027f18 Mon Sep 17 00:00:00 2001
From: Esty Thomas <esty@healpay.com>
Date: Thu, 27 Dec 2018 12:27:42 -0500
Subject: [PATCH] Renames var to prevent "double is read-only" error

Under some build systems, the function `double` produces an error:
```SyntaxError: "double" is read-only"```
The error goes away if the variable named `double` inside the function
named `double` is renamed. This commit renames it to `double_var` for
simplicity's sake.
---
 src/util.js | 8 ++++----
 1 file changed, 4 insertions(+), 4 deletions(-)

diff --git a/src/util.js b/src/util.js
index dbc8de3f..93e426f0 100644
--- a/src/util.js
+++ b/src/util.js
@@ -503,13 +503,13 @@ export default {
    * @param {Uint8Array} data
    */
   double: function(data) {
-    const double = new Uint8Array(data.length);
+    const double_var = new Uint8Array(data.length);
     const last = data.length - 1;
     for (let i = 0; i < last; i++) {
-      double[i] = (data[i] << 1) ^ (data[i + 1] >> 7);
+      double_var[i] = (data[i] << 1) ^ (data[i + 1] >> 7);
     }
-    double[last] = (data[last] << 1) ^ ((data[0] >> 7) * 0x87);
-    return double;
+    double_var[last] = (data[last] << 1) ^ ((data[0] >> 7) * 0x87);
+    return double_var;
   },
 
   /**