From 51a0a3813577f20dd76a297e51d2b4445546a7d9 Mon Sep 17 00:00:00 2001
From: Teashrock <kajitsu22@gmail.com>
Date: Mon, 13 Aug 2018 16:31:41 +0300
Subject: [PATCH] Fixed absent variable exception while trying to raise another
 exception.

---
 modules/mono/config.py | 1 +
 1 file changed, 1 insertion(+)

diff --git a/modules/mono/config.py b/modules/mono/config.py
index 9a000a2a72f..7f226443a17 100644
--- a/modules/mono/config.py
+++ b/modules/mono/config.py
@@ -83,6 +83,7 @@ def configure(env):
     mono_lib_names = ['mono-2.0-sgen', 'monosgen-2.0']
 
     if env['platform'] == 'windows':
+        mono_root = None
         if bits == '32':
             if os.getenv('MONO32_PREFIX'):
                 mono_root = os.getenv('MONO32_PREFIX')