From e226f001e4e4633d64c52be4abc1915d7b7bd515 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?=E5=AE=8B=E9=93=84=E8=BF=90?= <fnlctrl@gmail.com>
Date: Sun, 18 Dec 2016 21:48:02 +0800
Subject: [PATCH] Support usage when size = 0

I got an error when encoding an empty message (`{}`).
When the message is empty,  the size is 0 and `slab` is null, so`slice.call(slab, offset, offset += size);` gave me
```
Uncaught TypeError: Method get TypedArray.prototype.subarray called on incompatible receiver null
```
Adding this solved the issue for me. Please correct me if I was using it all wrong. :joy:
---
 src/util/pool/index.js | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/util/pool/index.js b/src/util/pool/index.js
index ea4feaddc..3f2337b7e 100644
--- a/src/util/pool/index.js
+++ b/src/util/pool/index.js
@@ -34,7 +34,7 @@ function pool(alloc, slice, size) {
     var slab   = null;
     var offset = SIZE;
     return function pool_alloc(size) {
-        if (size > MAX)
+        if (size > MAX || size === 0)
             return alloc(size);
         if (offset + size > SIZE) {
             slab = alloc(SIZE);