[LyX/master] Initialize class members to please coverity

[Jean-Marc Lasgouttes]

commit af45bfaee1dbfcde9930ceaac62bc11a3dfd8de7
Author: Jean-Marc Lasgouttes <lasgout...@lyx.org>
Date:   Wed Mar 1 16:28:30 2017 +0100

    Initialize class members to please coverity
---
 src/frontends/qt4/GuiDocument.h |    3 ++-
 1 files changed, 2 insertions(+), 1 deletions(-)

diff --git a/src/frontends/qt4/GuiDocument.h b/src/frontends/qt4/GuiDocument.h
index 38f099a..e202bd9 100644
--- a/src/frontends/qt4/GuiDocument.h
+++ b/src/frontends/qt4/GuiDocument.h
@@ -357,7 +357,8 @@ class FontModule : public UiWidget<Ui::FontUi>
 {
        Q_OBJECT
 public:
-       FontModule(QWidget * parent) : UiWidget<Ui::FontUi>(parent) {}
+       FontModule(QWidget * parent) : UiWidget<Ui::FontUi>(parent),
+          font_sf_scale(100), font_tt_scale(100) {}
        /// The roman font currently not selected by osFontsCB->isChecked()
        QString font_roman;
        /// The sans font currently not selected by osFontsCB->isChecked()