Add missing permission check to the document duplicate scan link.

Signed-off-by: Roberto Rosario <roberto.rosario.gonzalez@gmail.com>

HISTORY.rst

@@ -69,6 +69,8 @@
 - Add cascade permission check to the index rebuild tool link.
 - The index rebuild tool now responds with the number of indexes
   queued to rebuild instead of a static acknowledment.
+- Add missing permission check to the document duplicate scan
+  link.
 
 3.0.1 (2018-07-08)
 =================

mayan/apps/documents/links.py

@@ -335,6 +335,7 @@ link_document_duplicates_list = Link(
 )
 link_duplicated_document_scan = Link(
     icon_class=icon_duplicated_document_scan,
+    permissions=(permission_document_tools,),
     text=_('Duplicated document scan'),
     view='documents:duplicated_document_scan'
 )