[LyX/master] Pass languages also if babel is provided by class.

[Juergen Spitzmueller]

commit 1cf1eaf1fec4bacdf066a24112cc8bd89a0e4b7d
Author: Juergen Spitzmueller <sp...@lyx.org>
Date:   Wed Aug 1 15:46:00 2018 +0200

    Pass languages also if babel is provided by class.
    
    This is needed to load all used languages.
---
 src/BufferParams.cpp |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)

diff --git a/src/BufferParams.cpp b/src/BufferParams.cpp
index 3819e6d..503cc77 100644
--- a/src/BufferParams.cpp
+++ b/src/BufferParams.cpp
@@ -1697,7 +1697,7 @@ bool BufferParams::writeLaTeX(otexstream & os, 
LaTeXFeatures & features,
        bool const use_babel = features.useBabel() && 
!features.isProvided("babel");
        bool const use_polyglossia = features.usePolyglossia();
        bool const global = lyxrc.language_global_options;
-       if (use_babel || (use_polyglossia && global)) {
+       if (features.useBabel() || (use_polyglossia && global)) {
                language_options << features.getBabelLanguages();
                if (!language->babel().empty()) {
                        if (!language_options.str().empty())