Fix a regression that causes the MIPS code from building.

Upstream-Status: Backport
Signed-off-by: Ross Burton <ross.burton@intel.com>

From 7bfb22af123ac10798a9a4c9ec7b23e5065db35e Mon Sep 17 00:00:00 2001
From: DRC <information@libjpeg-turbo.org>
Date: Mon, 26 Sep 2016 17:59:14 -0500
Subject: [PATCH] Fix broken MIPS build

Regression introduced by 9055fb408dcb585ce9392d395e16630d51002152

Fixes #104
---
 ChangeLog.md      | 3 +++
 simd/jsimd_mips.c | 2 ++
 2 files changed, 5 insertions(+)

diff --git a/ChangeLog.md b/ChangeLog.md
index e2b9df3..71ddcaa 100644
--- a/ChangeLog.md
+++ b/ChangeLog.md
@@ -6,6 +6,9 @@
 1. Fixed a regression introduced by 1.5.1[7] that prevented libjpeg-turbo from
 building with Android NDK platforms prior to android-21 (5.0).
 
+2. Fixed a regression introduced by 1.5.1[1] that prevented the MIPS DSPR2 SIMD
+code in libjpeg-turbo from building.
+
 
 1.5.1
 =====
diff --git a/simd/jsimd_mips.c b/simd/jsimd_mips.c
index 63b8115..02e90cd 100644
--- a/simd/jsimd_mips.c
+++ b/simd/jsimd_mips.c
@@ -63,6 +63,8 @@ parse_proc_cpuinfo(const char* search_string)
 LOCAL(void)
 init_simd (void)
 {
+  char *env = NULL;
+
   if (simd_support != ~0U)
     return;