Index: trunk/src_plugins/hid_lesstif/FillBox.c
===================================================================
--- trunk/src_plugins/hid_lesstif/FillBox.c	(revision 24717)
+++ trunk/src_plugins/hid_lesstif/FillBox.c	(revision 24718)
@@ -341,8 +341,10 @@
 /*	PxmFillBoxWidget rw = (PxmFillBoxWidget) request_w;*/
 	PxmFillBoxWidget nw = (PxmFillBoxWidget) new_w;
 
-	/* Initialize one of the internal fields of the PxmFillBox widget. */
+	/* Initialize internal fields of the PxmFillBox widget. */
 	nw->fillBox.processing_constraints = False;
+	nw->core.width = nw->core.height = 0;
+	nw->fillBox.margin_width = nw->fillBox.margin_height = 0;
 }