Put braces around all calls to wxLogFunctions() inside an if statement.

This suppresses all the remaining g++ -Wparentheses warnings and uses consistent style everywhere.

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@61475 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

samples/widgets/listbox.cpp

@@ -593,9 +593,13 @@ void ListboxWidgetsPage::OnListbox(wxCommandEvent& event)
     m_textDelete->SetValue(wxString::Format(_T("%ld"), sel));
 
     if (event.IsSelection())
+    {
         wxLogMessage(_T("Listbox item %ld selected"), sel);
+    }
     else
+    {
         wxLogMessage(_T("Listbox item %ld deselected"), sel);
+    }
 }
 
 void ListboxWidgetsPage::OnListboxDClick(wxCommandEvent& event)