Added test whether wchar_t is signed or not. A signed wchar_t is not usable as internal unicode type base for Py_UNICODE since the unicode implementation assumes an unsigned type.
diff --git a/Misc/NEWS b/Misc/NEWS
index 9bfd738..1a320ce 100644
--- a/Misc/NEWS
+++ b/Misc/NEWS
@@ -12,6 +12,10 @@
 Core and builtins
 -----------------
 
+- Added test whether wchar_t is signed or not. A signed wchar_t is not
+  usable as internal unicode type base for Py_UNICODE since the
+  unicode implementation assumes an unsigned type.
+
 - Fixed a bug in the cache of length-one Unicode strings that could
   lead to a seg fault.  The specific problem occurred when an earlier,
   non-fatal error left an uninitialized Unicode object in the