Make it 1.5.2 compatible again.

Lib/distutils/msvccompiler.py

@@ -117,6 +117,7 @@ def get_msvc_paths (path, version='6.0', platform='x86'):
                     if string.upper(p) == path:
                         V = string.split(v,';')
                         for v in V:
+                            if hasattr(v, "encode"):
                                 try:
                                     v = v.encode("mbcs")
                                 except UnicodeError: