Issue #6848: Fix curses module build failure on OS X 10.6.
diff --git a/Include/py_curses.h b/Include/py_curses.h
index f38f765..e4c0a6e 100644
--- a/Include/py_curses.h
+++ b/Include/py_curses.h
@@ -10,7 +10,12 @@
#ifdef _BSD_WCHAR_T_DEFINED_
#define _WCHAR_T
#endif
-#endif
+
+/* the following define is necessary for OS X 10.6; without it, the
+ Apple-supplied ncurses.h sets NCURSES_OPAQUE to 1, and then Python
+ can't get at the WINDOW flags field. */
+#define NCURSES_OPAQUE 0
+#endif /* __APPLE__ */
#ifdef __FreeBSD__
/*