Windows.h -> windows.h for cross-mingw build

diff --git a/src/filesys.cpp b/src/filesys.cpp
index 8248a13d46f3703c48061faa68f3b2e150289f8e..037d21fdbbe34f71d2b0f4a6987be4c14e96c6d0 100644 (file)
--- a/src/filesys.cpp
+++ b/src/filesys.cpp
@@ -28,7 +28,7 @@ namespace fs
 #ifdef _WIN32 // WINDOWS
 
 #define _WIN32_WINNT 0x0501
-#include <Windows.h>
+#include <windows.h>
 #include <stdio.h>
 #include <malloc.h>
 #include <tchar.h>