Related: tdf#151509 make what the x/y values are more clear

we're re-deriving in a more complicated way values we already have
available.

no change of logic intended.

Change-Id: I14232558312e5457dce7a949cdafe0518214894d
Reviewed-on: https://gerrit.libreoffice.org/c/core/+/142270
Tested-by: Jenkins
Reviewed-by: Caolán McNamara <caolanm@redhat.com>
diff --git a/vcl/unx/gtk3/gtkframe.cxx b/vcl/unx/gtk3/gtkframe.cxx
index c4c502e..024c96e 100644
--- a/vcl/unx/gtk3/gtkframe.cxx
+++ b/vcl/unx/gtk3/gtkframe.cxx
@@ -3204,8 +3204,8 @@ gboolean GtkSalFrame::signalButton(GtkWidget*, GdkEventButton* pEvent, gpointer 
    if (!aDel.isDeleted())
    {
        bRet = pThis->DrawingAreaButton(nEventType,
                                        pEvent->x_root - pThis->maGeometry.x(),
                                        pEvent->y_root - pThis->maGeometry.y(),
                                        nEventX,
                                        nEventY,
                                        pEvent->button,
                                        pEvent->time,
                                        pEvent->state);
@@ -3515,9 +3515,7 @@ gboolean GtkSalFrame::signalMotion( GtkWidget*, GdkEventMotion* pEvent, gpointer

    if (!aDel.isDeleted())
    {
        pThis->DrawingAreaMotion(pEvent->x_root - pThis->maGeometry.x(),
                                 pEvent->y_root - pThis->maGeometry.y(),
                                 pEvent->time, pEvent->state);
        pThis->DrawingAreaMotion(nEventX, nEventY, pEvent->time, pEvent->state);
    }

    if (!aDel.isDeleted())