[LyX/master] lineno: dump lineno buffer token if false/empty as well.

[Pavel Sanda]

commit bea2756472918c7da42f40aa1ac851cd330d626b
Author: Pavel Sanda <sa...@lyx.org>
Date:   Fri May 24 15:50:10 2019 +0200

    lineno: dump lineno buffer token if false/empty as well.
    
    Oversmarted myself. Wanted to save .lyx header from overbloating but
    dialog's UI depends on those tokens when disabling the option in UI.
---
 src/BufferParams.cpp |    6 ++----
 1 files changed, 2 insertions(+), 4 deletions(-)

diff --git a/src/BufferParams.cpp b/src/BufferParams.cpp
index dd7d950..dbe5d7f 100644
--- a/src/BufferParams.cpp
+++ b/src/BufferParams.cpp
@@ -1326,12 +1326,10 @@ void BufferParams::writeFile(ostream & os, Buffer const 
* buf) const
           << "\n\\justification " << convert<string>(justification)
           << "\n\\use_refstyle " << use_refstyle
           << "\n\\use_minted " << use_minted
+          << "\n\\use_lineno " << use_lineno
           << '\n';
 
-       if (use_lineno)
-               os << "\\use_lineno " << use_lineno << '\n';
-       if (!lineno_opts.empty())
-                os << "\\lineno_options " << lineno_opts << '\n';
+        os << "\\lineno_options " << lineno_opts << '\n';
 
        if (isbackgroundcolor == true)
                os << "\\backgroundcolor " << lyx::X11hexname(backgroundcolor) 
<< '\n';