Add a note about the zlib.decompressobj().flush() fix.
diff --git a/Misc/NEWS b/Misc/NEWS
index 1c086c3..878305d 100644
--- a/Misc/NEWS
+++ b/Misc/NEWS
@@ -15,6 +15,9 @@
 Extensions Modules
 ------------------
 
+- zlib.decompressobj().flush(value) no longer crashes the interpreter when
+  passed a value less than or equal to zero.
+
 Library
 -------