The malloc rearrangement was actually already in 1.6.
diff --git a/Misc/NEWS b/Misc/NEWS
index 0b7102b..5a30b7f 100644
--- a/Misc/NEWS
+++ b/Misc/NEWS
@@ -291,9 +291,6 @@
 of header files.  (Few of these ever need to be included explicitly;
 they are all included by Python.h.)
 
-Vladimir Marangozov redesigned more rational APIs for allocating
-memory.  See pymem.h.
-
 Trent Mick ensured portability to 64-bit platforms, under both Linux
 and Win64, especially for the new Intel Itanium processor.