Resolves: tdf#124980 drop dangling timer

Change-Id: I05ec394ee83f0422ecccf3ae3377818af6feb1d1
Reviewed-on: https://gerrit.libreoffice.org/71398
Tested-by: Jenkins
Reviewed-by: Caolán McNamara <caolanm@redhat.com>
Tested-by: Caolán McNamara <caolanm@redhat.com>
(cherry picked from commit 9207516888e73398599a9890af78cd677ddd0992)
Reviewed-on: https://gerrit.libreoffice.org/71411
Reviewed-by: Michael Stahl <Michael.Stahl@cib.de>
diff --git a/vcl/unx/gtk3/gtk3gtkinst.cxx b/vcl/unx/gtk3/gtk3gtkinst.cxx
index 18d897c..caec6ba 100644
--- a/vcl/unx/gtk3/gtk3gtkinst.cxx
+++ b/vcl/unx/gtk3/gtk3gtkinst.cxx
@@ -7505,6 +7505,8 @@ public:

    virtual ~GtkInstanceEntryTreeView() override
    {
        if (m_nAutoCompleteIdleId)
            g_source_remove(m_nAutoCompleteIdleId);
        GtkWidget* pWidget = m_pEntry->getWidget();
        g_signal_handler_disconnect(pWidget, m_nKeyPressSignalId);
        g_signal_handler_disconnect(pWidget, m_nEntryInsertTextSignalId);