From 4a962ff2189e8bdbcd79813d67e3af0f1c465f7c Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Carlo=20Marcelo=20Arenas=20Bel=C3=B3n?= <carenas@gmail.com>
Date: Sat, 10 Aug 2019 19:14:01 -0700
Subject: configure: avoid undefined check_for_ca_bundle

instead of using a "greater than 0" test, check for variable being
set, as it is always set to 1, and could be left unset if non of
OPENSSL MBEDTLS GNUTLS WOLFSSL is being configured for.

Closes #4213
---
 configure.ac | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/configure.ac b/configure.ac
index 1ddc3d601..020a0e08c 100755
--- a/configure.ac
+++ b/configure.ac
@@ -2633,7 +2633,7 @@ dnl **********************************************************************
 dnl Check for the CA bundle
 dnl **********************************************************************
 
-if test "$check_for_ca_bundle" -gt 0; then
+if test -n "$check_for_ca_bundle"; then
   CURL_CHECK_CA_BUNDLE
 fi
 
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