Catch `textmissing` in revision (#111)

1b2530ca84/includes/api/ApiQueryRevisionsBase.php (L451)

wikiteam3/dumpgenerator/dump/page/xmlrev/xml_revisions_page.py

@@ -42,7 +42,9 @@ def makeXmlFromPage(page: dict, arvcontinue) -> str:
                 E.timestamp(rev["timestamp"]),]
 
             # The text, user, comment, sha1 may be deleted/suppressed
-            if 'texthidden' in rev:
+            if 'texthidden' or 'textmissing' in rev:
+                if 'textmissing' in rev:
+                    print("Warning: text missing in pageid %d revid %d" % (page['pageid'], rev['revid']))
                 revision.append(E.text(**{
                     'bytes': str(size),
                     'deleted': 'deleted',