update for CVS versions of bakefile

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@28108 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

build/bakefiles/wxwin.py

@@ -11,6 +11,13 @@ import utils
 # register a substitution function for it that provides additional knowledge
 # about the option (in this case that it does not contain dir separators and
 # so utils.nativePaths() doesn't have to do anything with it):
+
+try:
+    # this fails in 0.1.4 and 0.1.5 has different subst.callbacks signature:
+    utils.checkBakefileVersion('0.1.5') 
+    def __noopSubst(name, func, caller):
+        return '$(%s)' % name
+except AttributeError:
     def __noopSubst(func, name):
         return '$(%s)' % name
 utils.addSubstituteCallback('CFG', __noopSubst)