From 336821dea78da61739177de57fe10d4e5fcc71ff Mon Sep 17 00:00:00 2001
From: Gareth Jones <jones258@gmail.com>
Date: Sun, 7 Jul 2019 00:31:20 +1200
Subject: [PATCH] =?UTF-8?q?fix:=20=F0=9F=90=9B=20allow=20`modeToNumber`=20?=
 =?UTF-8?q?to=20be=20called=20w/=20`undefined`?=
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---
 src/volume.ts | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/volume.ts b/src/volume.ts
index 6f1c521d..ed7b2ce6 100644
--- a/src/volume.ts
+++ b/src/volume.ts
@@ -456,7 +456,7 @@ function _modeToNumber(mode: TMode | undefined, def?): number | undefined {
   return undefined;
 }
 
-function modeToNumber(mode: TMode, def?): number {
+function modeToNumber(mode: TMode | undefined, def?): number {
   const result = _modeToNumber(mode, def);
   if (typeof result !== 'number' || isNaN(result)) throw new TypeError(ERRSTR.MODE_INT);
   return result;