Define WIN32_LEAN_AND_MEAN conditionally.

bnoordhuis · bnoordhuis · commit 90078ecb1741 · 2015-11-25T22:50:53.000+01:00
Fixes: #823 PR-URL: #824 Reviewed-By: Bert Belder <bertbelder@gmail.com>
diff --git a/src/win_delay_load_hook.c b/src/win_delay_load_hook.c
@@ -9,7 +9,10 @@
 
 #ifdef _MSC_VER
 
+#ifndef WIN32_LEAN_AND_MEAN
 #define WIN32_LEAN_AND_MEAN
+#endif
+
 #include <windows.h>
 
 #include <delayimp.h>
