coverity#1351757 Uninitialized pointer field

Change-Id: Ieeae560fc6b6c82ef92ad5331cc6cddacb893a19
diff --git a/libreofficekit/qa/gtktiledviewer/gtktiledviewer.cxx b/libreofficekit/qa/gtktiledviewer/gtktiledviewer.cxx
index 8286b18..6ea864b 100644
--- a/libreofficekit/qa/gtktiledviewer/gtktiledviewer.cxx
+++ b/libreofficekit/qa/gtktiledviewer/gtktiledviewer.cxx
@@ -196,6 +196,7 @@ public:
        m_pScrolledWindow(nullptr),
        m_bToolItemBroadcast(true),
        m_pVBox(nullptr),
        m_pMainHBox(nullptr),
        m_pPartSelector(nullptr),
        m_pPartModeComboBox(nullptr),
        m_bPartSelectorBroadcast(true),