applied patch from Brent Hendricks to avoid leak in python bindings when

* python/generator.py python/libxml.c: applied patch from Brent
  Hendricks to avoid leak in python bindings when using schemas
  error handlers.
Daniel
diff --git a/python/generator.py b/python/generator.py
index 8add0a9..0856d76 100755
--- a/python/generator.py
+++ b/python/generator.py
@@ -346,6 +346,9 @@
         return 1
     if name == "xmlFreeValidCtxt":
         return 1
+    if name == "xmlSchemaFreeValidCtxt":
+        return 1
+
 #
 # Those are skipped because the Const version is used of the bindings
 # instead.