remove null bytes

Author: akshayphilar

parsel/selector.py

@@ -188,6 +188,7 @@ def __init__(self, text=None, type=None, namespaces=None, root=None,
         self._tostring_method = _ctgroup[st]['_tostring_method']
 
         if text is not None:
+            text = text.replace('\x00', '')
             if not isinstance(text, six.text_type):
                 raise TypeError("text argument should be of type %s" % six.text_type)
             root = self._get_root(text, base_url)