Add comment to Distutil files about requiring 1.5.2 compatibility, as

suggested by PEP 291.

Lib/distutils/msvccompiler.py

@@ -3,11 +3,12 @@
 Contains MSVCCompiler, an implementation of the abstract CCompiler class
 for the Microsoft Visual Studio."""
 
-
 # Written by Perry Stoll
 # hacked by Robin Becker and Thomas Heller to do a better job of
 #   finding DevStudio (through the registry)
 
+# This module should be kept compatible with Python 1.5.2.
+
 __revision__ = "$Id$"
 
 import sys, os, string