final touch running DTD validation on the XmlTextReader added a specific

* valid.c xmlreader.c: final touch running DTD validation
  on the XmlTextReader
* python/tests/Makefile.am python/tests/reader2.py: added a
  specific run based on the examples from test/valid/*.xml
Daniel

python/tests/reader2.py

@@ -0,0 +1,54 @@
+#!/usr/bin/python -u
+#
+# this tests the validation with the XmlTextReader interface
+#
+import sys
+import glob
+import string
+import libxml2
+
+# Memory debug specific
+libxml2.debugMemory(1)
+
+err=""
+expect="""../../test/valid/xlink.xml:450: validity error: ID dt-arc already defined
+	<p><termdef id="dt-arc" term="Arc">
+                                   ^
+../../test/valid/xlink.xml:529: validity error: attribute def line 199 references an unknown ID "dt-xlg"
+<?Pub *0000052575?>
+                   ^
+../../test/valid/rss.xml:172: validity error: Element rss does not carry attribute version
+</rss>
+      ^
+"""
+def callback(ctx, str):
+    global err
+    err = err + "%s" % (str)
+libxml2.registerErrorHandler(callback, "")
+
+valid_files = files = glob.glob("../../test/valid/*.x*")
+for file in valid_files:
+    if string.find(file, "t8") != -1:
+        continue
+    reader = libxml2.newTextReaderFilename(file)
+    #print "%s:" % (file)
+    reader.setParserProp(libxml2.PARSER_VALIDATE, 1)
+    ret = reader.read()
+    while ret == 1:
+        ret = reader.read()
+    if ret != 0:
+        print "Error parsing and validating %s" % (file)
+	#sys.exit(1)
+
+if err != expect:
+    print err
+
+del reader
+
+# Memory debug specific
+libxml2.cleanupParser()
+if libxml2.debugMemory(1) == 0:
+    print "OK"
+else:
+    print "Memory leak %d bytes" % (libxml2.debugMemory(1))
+    libxml2.dumpMemory()