Bug#640853: [checks/descriptions] more Refs

[Jakub Wilk <jwilk@debian.org>]

Package: lintian
Version: 2.5.2
Severity: wishlist
Tags: patch

The attached patch adds Ref fields to the following tags: 
package-has-no-description, description-synopsis-is-empty, 
extended-description-is-empty.

--
Jakub Wilk

diff --git a/checks/description.desc b/checks/description.desc
--- a/checks/description.desc
+++ b/checks/description.desc
@@ -5,33 +5,36 @@
 Info: Check if the Description control field of a binary package conforms
  to the rules in the Policy Manual (section 3.4).
 
 Tag: package-has-no-description
 Severity: serious
 Certainty: certain
 Info: The binary package does not have a "Description:" control field.
 Tested: empty
+Ref: policy 3.4
 
 Tag: description-synopsis-is-empty
 Severity: serious
 Certainty: certain
 Info: The first line in the "Description:" is empty.
+Ref: policy 3.4
 
 Tag: extended-description-contains-empty-paragraph
 Severity: normal
 Certainty: certain
 Info: The extended description (the lines after the first line of the
  "Description:" field) contains an empty paragraph.
 
 Tag: extended-description-is-empty
 Severity: serious
 Certainty: certain
 Info: The extended description (the lines after the first line of the
  "Description:" field) is empty.
+Ref: policy 3.4
 
 Tag: extended-description-is-probably-too-short
 Severity: minor
 Certainty: possible
 Ref: devref 6.2.1, devref 6.2.3
 Info: The extended description (the lines after the first line of the
  "Description:" field) is only one or two lines long.  The extended
  description should provide a user with enough information to decide