From ec1fd40e5664f2d89d1911316d024376e063de01 Mon Sep 17 00:00:00 2001
From: Martin Nowak <martin.nowak@plugintheworld.com>
Date: Wed, 7 Jan 2015 19:01:00 +0100
Subject: [PATCH] without an empty path no conf should be used

---
 src/mars.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/src/mars.c b/src/mars.c
index fe0464ae4cab..0ee04208bce7 100644
--- a/src/mars.c
+++ b/src/mars.c
@@ -375,7 +375,8 @@ int tryMain(size_t argc, const char *argv[])
     global.inifilename = parse_conf_arg(argc, argv);
     if (global.inifilename)
     {
-        if (!FileName::exists(global.inifilename))
+        // can be empty as in -conf=
+        if (strlen(global.inifilename) && !FileName::exists(global.inifilename))
             error(Loc(), "Config file '%s' does not exist.", global.inifilename);
     }
     else