[LyX/master] Fix totalheight reversion routine if there was no totalheight set

[Juergen Spitzmueller]

commit 44bfdbd5b2b1bcd3282ad98b7b77644c52c38bd6
Author: Juergen Spitzmueller <sp...@lyx.org>
Date:   Wed Aug 28 07:27:28 2019 +0200

    Fix totalheight reversion routine if there was no totalheight set
---
 lib/lyx2lyx/lyx_2_4.py |    6 +++++-
 1 files changed, 5 insertions(+), 1 deletions(-)

diff --git a/lib/lyx2lyx/lyx_2_4.py b/lib/lyx2lyx/lyx_2_4.py
index 8436d9a..40a1f3d 100644
--- a/lib/lyx2lyx/lyx_2_4.py
+++ b/lib/lyx2lyx/lyx_2_4.py
@@ -3523,7 +3523,11 @@ def revert_totalheight(document):
                 else:
                     del document.body[kk]
         elif oldheight != "":
-            document.body.insert(k, "\theight " + oldheight) 
+            if special != "":
+                document.body[k] = "\tspecial " + special
+                document.body.insert(k, "\theight " + oldheight)
+            else:
+                document.body[k] = "\theight " + oldheight
         i = j + 1