don't segfault when \N escapes are used and unicodedata fails to load

Fixes #4367
diff --git a/Misc/NEWS b/Misc/NEWS
index 1fcf319..d691d8c 100644
--- a/Misc/NEWS
+++ b/Misc/NEWS
@@ -12,6 +12,9 @@
 Core and Builtins
 -----------------
 
+- Issue #4367: Python would segfault during compiling when the unicodedata
+  module couldn't be imported and \N escapes were present.
+
 - Issue #4233: Changed semantic of ``_fileio.FileIO``'s ``close()`` 
   method on file objects with closefd=False. The file descriptor is still
   kept open but the file object behaves like a closed file. The ``FileIO``