- Fix segfault with invalid coding.
- SF Bug #772896, unknown encoding results in MemoryError, which is not helpful

I will only backport the segfault fix.  I'll let Anthony decide if he wants
the other changes backported.  I will do the backport if asked.
diff --git a/Misc/NEWS b/Misc/NEWS
index 2c58dae..bf40e9d 100644
--- a/Misc/NEWS
+++ b/Misc/NEWS
@@ -12,6 +12,10 @@
 Core and builtins
 -----------------
 
+- Fix segfault with invalid coding.
+
+- SF bug #772896: unknown encoding results in MemoryError.
+
 - All iterators now have a Boolean value of true.  Formerly, some iterators
   supported a __len__() method which evaluated to False when the iterator
   was empty.