Fix wrong condition that may lead to NULL being set as 'Vary' header

git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/trunk@1132467 13f79535-47bb-0310-9956-ffa450edef68

diff --git a/server/util_expr_eval.c b/server/util_expr_eval.c
index bb7ebc41a3293c2590cdac6d7d9f9567f5cbfdf8..544b7a043ed56c40ba3a60a0917d400642556787 100644 (file)
--- a/server/util_expr_eval.c
+++ b/server/util_expr_eval.c
@@ -720,7 +720,7 @@ AP_DECLARE(int) ap_expr_exec_ctx(ap_expr_eval_ctx_t *ctx)
                       "Evaluation of expression from %s:%d gave: %d",
                       ctx->info->filename, ctx->info->line_number, rc);
 
-        if (ctx->vary_this)
+        if (*ctx->vary_this)
             apr_table_merge(ctx->r->headers_out, "Vary", *ctx->vary_this);
 
         return rc;