From b910106713efd4e37d7431820176b3511fff63b7 Mon Sep 17 00:00:00 2001
From: Bret Curtis <psi29a@gmail.com>
Date: Sun, 22 Jul 2018 07:17:34 +0000
Subject: [PATCH] Catch an unbound variable before it happens.

---
 CI/before_script.msvc.sh | 1 +
 1 file changed, 1 insertion(+)

diff --git a/CI/before_script.msvc.sh b/CI/before_script.msvc.sh
index 264d33dd2..0b25247a1 100644
--- a/CI/before_script.msvc.sh
+++ b/CI/before_script.msvc.sh
@@ -428,6 +428,7 @@ fi
 			printf "Exists. "
 		elif [ -z $SKIP_EXTRACT ]; then
 			rm -rf Boost
+			CI_EXTRA_INNO_OPTIONS = ""
 			[ -n "$CI" ] && CI_EXTRA_INNO_OPTIONS="//SUPPRESSMSGBOXES //LOG='boost_install.log'"
 			"${DEPS}/boost-1.67.0-msvc${MSVC_YEAR}-win${BITS}.exe" //DIR="${CWD_DRIVE_ROOT}" //VERYSILENT //NORESTART ${CI_EXTRA_INNO_OPTIONS}
 			mv "${CWD_DRIVE_ROOT_BASH}" "${BOOST_SDK}"