Enable nameless structures in C++ for gcc >= 3.x (discovery and
testing done by Dan Kegel).

include/winnt.h

diff --git a/include/winnt.h b/include/winnt.h
index 3272b83..a377c4b 100644
--- a/include/winnt.h
+++ b/include/winnt.h
@@ -140,8 +140,8 @@
 # define NONAMELESSSTRUCT
 # define NONAMELESSUNION
 #else
-/* Anonymous struct support starts with gcc 2.96 */
-# if !defined(NONAMELESSSTRUCT) && (defined(__GNUC__) && (defined(__cplusplus) || ((__GNUC__ < 2) || ((__GNUC__ == 2) && (__GNUC_MINOR__ < 96))))) || defined(__SUNPRO_C) || defined(__SUNPRO_CC)
+/* Anonymous struct support starts with gcc 2.96 or gcc/g++ 3.x */
+# if !defined(NONAMELESSSTRUCT) && (defined(__GNUC__) && ((__GNUC__ < 2) || ((__GNUC__ == 2) && (defined(__cplusplus) || (__GNUC_MINOR__ < 96))))) || defined(__SUNPRO_C) || defined(__SUNPRO_CC)
 #  define NONAMELESSSTRUCT
 # endif
 /* Anonymous unions support starts with gcc 2.96/g++ 2.95 */