block.material + minor refactor

src/util/platform.cpp

@@ -7,7 +7,7 @@
 
 #include "../typedefs.h"
 
-#ifdef WIN32
+#ifdef _WIN32
 #include <Windows.h>
 
 #include "./stringutil.h"
@@ -41,4 +41,4 @@ std::string platform::detect_locale() {
     return preferredLocaleName.substr(0, 5);
 }
 
-#endif
+#endif