tdf#135317 avoid reenterence

Change-Id: I79b6c1c2a2503c49a94f6c7ed74286f53ccebd44
Reviewed-on: https://gerrit.libreoffice.org/c/core/+/99821
Tested-by: Jenkins
Tested-by: Xisco Fauli <xiscofauli@libreoffice.org>
Reviewed-by: Xisco Fauli <xiscofauli@libreoffice.org>
Reviewed-by: Caolán McNamara <caolanm@redhat.com>
diff --git a/vcl/unx/gtk3/gtk3gtkinst.cxx b/vcl/unx/gtk3/gtk3gtkinst.cxx
index a6e6901..658c09a 100644
--- a/vcl/unx/gtk3/gtk3gtkinst.cxx
+++ b/vcl/unx/gtk3/gtk3gtkinst.cxx
@@ -12225,6 +12225,7 @@ private:
    gulong m_nOutputSignalId;
    gulong m_nInputSignalId;
    bool m_bEmptyField;
    bool m_bSyncingValue;
    double m_dValueWhenEmpty;

    bool signal_output()
@@ -12285,6 +12286,7 @@ public:
        , m_nOutputSignalId(g_signal_connect(pButton, "output", G_CALLBACK(signalOutput), this))
        , m_nInputSignalId(g_signal_connect(pButton, "input", G_CALLBACK(signalInput), this))
        , m_bEmptyField(false)
        , m_bSyncingValue(false)
        , m_dValueWhenEmpty(0.0)
    {
    }
@@ -12359,9 +12361,14 @@ public:
    {
        if (!m_pFormatter)
            return;
        // tdf#135317 avoid reenterence
        if (m_bSyncingValue)
            return;
        m_bSyncingValue = true;
        disable_notify_events();
        gtk_spin_button_set_value(m_pButton, m_pFormatter->GetValue());
        enable_notify_events();
        m_bSyncingValue = false;
    }

    virtual void sync_range_from_formatter() override