From 44e658ced7b4de57bf3b88a2461a764d1eb14729 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Johan=20Bergstr=C3=B6m?= <bugs@bergstroem.nu>
Date: Tue, 13 Jan 2015 14:09:07 +1100
Subject: [PATCH] build: initialize variable before use

found with `make --warn-undefined-variables`
---
 Makefile | 1 +
 1 file changed, 1 insertion(+)

diff --git a/Makefile b/Makefile
index c2b46ff6e0562f..792ec1139d486e 100644
--- a/Makefile
+++ b/Makefile
@@ -20,6 +20,7 @@ NODE_G_EXE = iojs_g$(EXEEXT)
 # or set the V environment variable to an empty string.
 V ?= 1
 
+USE_NINJA ?= 0
 ifeq ($(USE_NINJA),1)
 ifneq ($(V),)
 NINJA := $(NINJA) -v