Merge pull request #21876 from 3vilM33pl3/master

Move windows.h to before check for minimum version instead of after

include/grpc/impl/codegen/port_platform.h

@@ -53,6 +53,8 @@
 #define NOMINMAX
 #endif /* NOMINMAX */
 
+#include <windows.h>
+
 #ifndef _WIN32_WINNT
 #error \
     "Please compile grpc with _WIN32_WINNT of at least 0x600 (aka Windows Vista)"
@@ -63,8 +65,6 @@
 #endif /* _WIN32_WINNT < 0x0600 */
 #endif /* defined(_WIN32_WINNT) */
 
-#include <windows.h>
-
 #ifdef GRPC_WIN32_LEAN_AND_MEAN_WAS_NOT_DEFINED
 #undef GRPC_WIN32_LEAN_AND_MEAN_WAS_NOT_DEFINED
 #undef WIN32_LEAN_AND_MEAN