only register published pages in tags

fgs/datatypes.py

@@ -256,6 +256,8 @@ class Tag:
     def reg_page(self, page, is_category = False):
         if page == None:
             return
+        if page.status != "published":
+            return
         if page.lang != self.lang:
             raise Exception("Page has different lang than Tag.", page.lang, tag.lang)
         self.pages.add(page)