From b89b89abeaf48c825bc2b4b22a035ada3293f4c3 Mon Sep 17 00:00:00 2001
From: Charles Dang <exodia339@gmail.com>
Date: Fri, 11 May 2018 11:22:25 +1100
Subject: [PATCH] Only redefine VOLUME_NAME_NONE if it's not previously defined

---
 src/filesystem_boost.cpp | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/src/filesystem_boost.cpp b/src/filesystem_boost.cpp
index 591fa80901a9..96573205f633 100644
--- a/src/filesystem_boost.cpp
+++ b/src/filesystem_boost.cpp
@@ -39,7 +39,9 @@
 #include <shlwapi.h>
 
 // Work around TDM-GCC not #defining this according to @newfrenchy83.
+#ifndef VOLUME_NAME_NONE
 #define VOLUME_NAME_NONE 0x4
+#endif
 
 #endif /* !_WIN32 */