added using python 2 2 or earlier

dtool/LocalSetup.pp

@@ -448,4 +448,7 @@ $[cdefine VC6_STYLE_ALLOCATOR]
 $[cdefine MODERN_STYLE_ALLOCATOR]
 $[cdefine NO_STYLE_ALLOCATOR]
 
+/* Define if you want to use Python before 2.3.  */
+$[cdefine USING_PYTHON_2_2_OR_EARLIER]
+
 #end dtool_config.h