[XML-SIG] Fixed source for XML tutorial

[Thomas Gagne]

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Though it was fairly easy to fix (and maybe that's part of the tutorial), the
source included doesn't work.  It calls parser.parseFile() with the an 'file'
argument but it never opened it.

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#!/usr/bin/env python
from xml.sax import saxlib
from xml.sax import saxexts

class FindIssue(saxlib.HandlerBase):
	def __init__(self, title, number):
		self.search_title, self.search_number = title, number

	def startElement(self, name, attrs):
		if name != 'comic':
			return
		
		title = attrs.get('title', None)
		number = attrs.get('number', None)
		if title == self.search_title and number == self.search_number:
			print title, '#' + str(number), 'found'

if __name__ == '__main__':
	parser = saxexts.make_parser()

	dh = FindIssue('Sandman', '62')

	parser.setDocumentHandler(dh)

	fh = open('test.xml', 'r')
	parser.parseFile(fh)

	parser.close()
	fh.close()

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