pytc rangefwm function now accept pefixes with embedded null bytes

pytc.c.patch

--- pytc.c.orig	2011-12-01 02:31:54.000000000 +0400
+++ pytc.c	2011-12-01 02:32:21.000000000 +0400
@@ -1555,14 +1555,15 @@
   int max;
   TCLIST *list;
   char *prefix;
+  int prefix_len;
   static char *kwlist[] = {"prefix", "max", NULL};
 
-  if (!PyArg_ParseTupleAndKeywords(args, keywds, "si:rangefwm", kwlist,
-                                   &prefix, &max)) {
+  if (!PyArg_ParseTupleAndKeywords(args, keywds, "s#i:rangefwm", kwlist,
+                                   &prefix, &prefix_len, &max)) {
     return NULL;
   }
   Py_BEGIN_ALLOW_THREADS
-  list = tcbdbrange3(self->bdb, prefix, max);
+  list = tcbdbfwmkeys(self->bdb, prefix, prefix_len, max);
   Py_END_ALLOW_THREADS
 
   TCLIST2PyList()