[LyX/master] Make a string translatable

[Guillaume MM]

commit 48a73a9e058971625fc76a03f70c52544f954cb5
Author: Guillaume MM <g...@lyx.org>
Date:   Sun Jun 11 06:01:04 2017 +0200

    Make a string translatable
---
 src/frontends/qt4/GuiWorkArea.cpp |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)

diff --git a/src/frontends/qt4/GuiWorkArea.cpp 
b/src/frontends/qt4/GuiWorkArea.cpp
index f50308f..95d1081 100644
--- a/src/frontends/qt4/GuiWorkArea.cpp
+++ b/src/frontends/qt4/GuiWorkArea.cpp
@@ -2229,7 +2229,7 @@ void GuiWorkAreaContainer::updateDisplay()
 {
        Buffer const & buf = wa_->bufferView().buffer();
        notificationFrame->setHidden(!buf.notifiesExternalModification());
-       QString const label = QString("<b>The file \"%1\" changed on disk.</b>")
+       QString const label = qt_("<b>The file %1 changed on disk.</b>")
                .arg(toqstr(buf.fileName().displayName()));
        externalModificationLabel->setText(label);
 }