727     miOverlayTreePtr tParent, tChild, tWin;  in miOverlayValidateTree()  local
758         for (tWin = tParent->firstChild; tWin != tChild; tWin = tWin->nextSib) {  in miOverlayValidateTree()
759             if (tWin->pWin->viewable)  in miOverlayValidateTree()
760                 RegionSubtract(&totalClip, &totalClip, &tWin->pWin->borderSize);  in miOverlayValidateTree()
765         for (tWin = tChild; tWin; tWin = tWin->nextSib) {  in miOverlayValidateTree()
766             if (tWin->valdata)  in miOverlayValidateTree()
767                 RegionAppend(&totalClip, &tWin->borderClip);  in miOverlayValidateTree()
775     for (tWin = tChild; tWin; tWin = tWin->nextSib) {  in miOverlayValidateTree()
776         if (tWin->valdata) {  in miOverlayValidateTree()
777             if (tWin->pWin->viewable) {  in miOverlayValidateTree()
779                                 &tWin->pWin->borderSize);  in miOverlayValidateTree()
780                 miOverlayComputeClips(tWin->pWin, &childClip, kind, &exposed);  in miOverlayValidateTree()
781                 RegionSubtract(&totalClip, &totalClip, &tWin->pWin->borderSize);  in miOverlayValidateTree()
784                 RegionEmpty(&tWin->clipList);  in miOverlayValidateTree()
785                 RegionEmpty(&tWin->borderClip);  in miOverlayValidateTree()
786                 tWin->valdata = NULL;  in miOverlayValidateTree()