Ignore XWiki pages with empty content in weblate translations

<?xml version="1.0" encoding="UTF-8"?>

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<xwikidoc>
  <web>XWiki</web>
  <name>XWikiSyntaxEscapes</name>
  <language>ru</language>
  <defaultLanguage>en</defaultLanguage>
  <translation>1</translation>
  <parent>XWiki.XWikiSyntax</parent>
  <creator>xwiki:XWiki.Admin</creator>
  <author>xwiki:XWiki.Admin</author>
  <customClass/>
  <contentAuthor>xwiki:XWiki.Admin</contentAuthor>
  <version>1.1</version>
  <title>XWikiSyntaxEscapes</title>
  <defaultTemplate/>
  <validationScript/>
  <comment/>
  <minorEdit>false</minorEdit>
  <syntaxId>xwiki/2.1</syntaxId>
  <hidden>true</hidden>

  <content></content>
</xwikidoc>