Issue1047

Parsing with pulldom doesn't work on jython trunk:
>>> from xml.dom.pulldom import parseString
>>> list(parseString("<foo></foo>"))
Traceback (most recent call last):
 File "<stdin>", line 1, in <module>
 File "/home/lsoto/src/jython.doj/jython/dist/Lib/xml/dom/pulldom.py",
line 231, in next
 rc = self.getEvent()
 File "/home/lsoto/src/jython.doj/jython/dist/Lib/xml/dom/pulldom.py",
line 285, in _emit
 rc = self.pulldom.firstEvent[1][0]
TypeError: 'NoneType' object is unsubscriptable

While I suspect that the root of the problem is the sax parser output
not conforming with what pulldom expects, changing DOMEventStream._emit
from:
 def _emit(self):
 """ Fallback replacement for getEvent() that emits
 the events that _slurp() read previously.
 """
 rc = self.pulldom.firstEvent[1][0]
 self.pulldom.firstEvent[1] = self.pulldom.firstEvent[1][1]
 return rc
To the following:
 def _emit(self):
 """ Fallback replacement for getEvent() that emits
 the events that _slurp() read previously.
 """
 if self.pulldom.firstEvent[1] is None:
 return None
 rc = self.pulldom.firstEvent[1][0]
 self.pulldom.firstEvent[1] = self.pulldom.firstEvent[1][1]
 return rc
*Seems* to work.

Workaround applied on r4836.
I think this need further investigation, thought.

Fixed in 2.5
Tested in test_minidom.testSAX2DOM