From c636b5dd1640c1f13f21bb2828c817213455229f Mon Sep 17 00:00:00 2001
From: John MacFarlane <jgm@berkeley.edu>
Date: Tue, 12 Oct 2021 20:08:35 -0700
Subject: Revert "Depend on pandoc-types 1.23, remove Null constructor on
 Block."

This reverts commit fb0d6c7cb63a791fa72becf21ed493282e65ea91.
---
 src/Text/Pandoc/Writers/Powerpoint/Presentation.hs | 1 +
 1 file changed, 1 insertion(+)

(limited to 'src/Text/Pandoc/Writers/Powerpoint')

diff --git a/src/Text/Pandoc/Writers/Powerpoint/Presentation.hs b/src/Text/Pandoc/Writers/Powerpoint/Presentation.hs
index 99b016a63..fe34d24dc 100644
--- a/src/Text/Pandoc/Writers/Powerpoint/Presentation.hs
+++ b/src/Text/Pandoc/Writers/Powerpoint/Presentation.hs
@@ -1041,6 +1041,7 @@ blockIsBlank
       HorizontalRule -> True
       Table{} -> False
       Div _ bls -> all blockIsBlank bls
+      Null -> True
 
 textIsBlank :: T.Text -> Bool
 textIsBlank = T.all isSpace
-- 
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