Fix some more Unicode in **kwargs issues in Py2.6

sleekxmpp/xmlstream/stanzabase.py

@@ -19,6 +19,7 @@ import logging
 import weakref
 from xml.etree import cElementTree as ET
 
+from sleekxmpp.util import safedict
 from sleekxmpp.xmlstream import JID
 from sleekxmpp.xmlstream.tostring import tostring
 from sleekxmpp.thirdparty import OrderedDict
@@ -679,6 +680,8 @@ class ElementBase(object):
         if lang and attrib in self.lang_interfaces:
             kwargs['lang'] = lang
 
+        kwargs = safedict(kwargs)
+
         if attrib == 'substanzas':
             return self.iterables
         elif attrib in self.interfaces or attrib == 'lang':
@@ -755,6 +758,8 @@ class ElementBase(object):
         if lang and attrib in self.lang_interfaces:
             kwargs['lang'] = lang
 
+        kwargs = safedict(kwargs)
+
         if attrib in self.interfaces or attrib == 'lang':
             if value is not None:
                 set_method = "set_%s" % attrib.lower()
@@ -841,6 +846,8 @@ class ElementBase(object):
         if lang and attrib in self.lang_interfaces:
             kwargs['lang'] = lang
 
+        kwargs = safedict(kwargs)
+
         if attrib in self.interfaces or attrib == 'lang':
             del_method = "del_%s" % attrib.lower()
             del_method2 = "del%s" % attrib.title()