[windows] Check for WINVER define before re-defining.

diff --git a/winconfig.h b/winconfig.h
index b30a3eb1c8e67f4e8ef9cd171b1dc6971f53fa99..71555cecf19cb644d73abd4909edb5fdf349616d 100644 (file)
--- a/winconfig.h
+++ b/winconfig.h
@@ -16,7 +16,9 @@
 #error Unknown architecture
 #endif
 
+#ifndef WINVER
 #define WINVER 0x0A00
+#endif
 
 #include <SDKDDKVer.h>