[LyX/master] Fix for recent luatex versions.

[Juergen Spitzmueller]

commit 97b9e81ceef7aaedcdbe012fba5f4972727d29ea
Author: Juergen Spitzmueller <sp...@lyx.org>
Date:   Sat Jul 9 16:45:27 2016 +0200

    Fix for recent luatex versions.
---
 src/LaTeXFeatures.cpp |   12 +++++++++++-
 1 files changed, 11 insertions(+), 1 deletions(-)

diff --git a/src/LaTeXFeatures.cpp b/src/LaTeXFeatures.cpp
index 16ec4c1..8b7287e 100644
--- a/src/LaTeXFeatures.cpp
+++ b/src/LaTeXFeatures.cpp
@@ -229,6 +229,13 @@ static docstring const papersizepdf_def = from_ascii(
        "\\pdfpageheight\\paperheight\n"
        "\\pdfpagewidth\\paperwidth\n");
 
+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"
+       "\\pageheight\\paperheight\n"
+       "\\pagewidth\\paperwidth\n");
+
 static docstring const cedilla_def = from_ascii(
        "\\newcommand{\\docedilla}[2]{\\underaccent{#1\\mathchar'30}{#2}}\n"
        "\\newcommand{\\cedilla}[1]{\\mathpalette\\docedilla{#1}}\n");
@@ -1173,8 +1180,11 @@ docstring const LaTeXFeatures::getMacros() const
        }
 
        if (mustProvide("papersize")) {
-               if (runparams_.flavor == OutputParams::LATEX)
+               if (runparams_.flavor == OutputParams::LATEX
+                   || runparams_.flavor == OutputParams::DVILUATEX)
                        macros << papersizedvi_def << '\n';
+               else if  (runparams_.flavor == OutputParams::LUATEX)
+                       macros << papersizepdflua_def << '\n';
                else
                        macros << papersizepdf_def << '\n';
        }