Fix crash after 24926b2e239.

The matched element may not have a parent. I guess the old version of
setExpanded too care of that. Now we have to do so.

diff --git a/src/frontends/qt/GuiPrefs.cpp b/src/frontends/qt/GuiPrefs.cpp
index d716d8544a6707e42dcb27528f5a904c1a045bfd..98aa0c12b86cb52464e92c0c720b27a3926cd7ba 100644 (file)
--- a/src/frontends/qt/GuiPrefs.cpp
+++ b/src/frontends/qt/GuiPrefs.cpp
@@ -3266,7 +3266,8 @@ void PrefShortcuts::on_searchLE_textEdited()
        for (int i = 0; i < matched.size(); ++i)
                if (!isAlwaysHidden(*matched[i])) {
                        matched[i]->setHidden(false);
-                       matched[i]->parent()->setExpanded(true);
+                       if (matched[i]->parent())
+                               matched[i]->parent()->setExpanded(true);
                }
 }