[LyX/master] Add forgotten parent

[Juergen Spitzmueller]

commit 934c6480c0cdbeb6e3abbef0bba72dd3d191b11d
Author: Juergen Spitzmueller <spitz at lyx.org>
Date:   Fri Mar 12 10:54:46 2021 +0100

    Add forgotten parent
---
 src/frontends/qt/GuiView.cpp |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)

diff --git a/src/frontends/qt/GuiView.cpp b/src/frontends/qt/GuiView.cpp
index 4c62484..7dd05f0 100644
--- a/src/frontends/qt/GuiView.cpp
+++ b/src/frontends/qt/GuiView.cpp
@@ -690,7 +690,7 @@ GuiView::GuiView(int id)
 						       lyxrc.defaultZoom)), this);
 	act_zoom_in_ = new QAction(qt_("Zoom &in"), this);
 	act_zoom_out_ = new QAction(qt_("Zoom &out"), this);
-	act_zoom_show_ = new QAction(qt_("Show zoom slider"));
+	act_zoom_show_ = new QAction(qt_("Show zoom slider"), this);
 	act_zoom_show_->setCheckable(true);
 	zoom_value_->addAction(act_zoom_default_);
 	zoom_value_->addAction(act_zoom_in_);