[LyX/2.2.x] Amend 7d52d37662f69

[Juergen Spitzmueller]

commit b14d9186bbe89369083c0d4be11147d286584398
Author: Juergen Spitzmueller <sp...@lyx.org>
Date:   Sun Sep 4 17:43:51 2016 +0200

    Amend 7d52d37662f69
    
    \@ifundefined is an If-Then-ELSE construct.
---
 src/LaTeXFeatures.cpp |    4 ++--
 1 files changed, 2 insertions(+), 2 deletions(-)

diff --git a/src/LaTeXFeatures.cpp b/src/LaTeXFeatures.cpp
index 23f1682..db2aa74 100644
--- a/src/LaTeXFeatures.cpp
+++ b/src/LaTeXFeatures.cpp
@@ -231,8 +231,8 @@ static docstring const papersizepdf_def = from_ascii(
 
 static docstring const papersizepdflua_def = from_ascii(
        "% Backwards compatibility for LuaTeX < 0.90\n"
-       "\\@ifundefined{pageheight}{\\let\\pageheight\\pdfpageheight}\n"
-       "\\@ifundefined{pagewidth}{\\let\\pagewidth\\pdfpagewidth}\n"
+       "\\@ifundefined{pageheight}{\\let\\pageheight\\pdfpageheight}{}\n"
+       "\\@ifundefined{pagewidth}{\\let\\pagewidth\\pdfpagewidth}{}\n"
        "\\pageheight\\paperheight\n"
        "\\pagewidth\\paperwidth\n");