--- XFree86-4.0/xc/lib/Xaw/Scrollbar.c.foo	Mon May 15 17:04:02 2000
+++ XFree86-4.0/xc/lib/Xaw/Scrollbar.c	Mon May 15 17:07:30 2000
@@ -831,6 +831,10 @@
 NotifyThumb(Widget gw, XEvent *event, String *params, Cardinal *num_params)
 {
     ScrollbarWidget w = (ScrollbarWidget)gw;
+    union {
+	    XtPointer xt_pt;
+	    float xt_top;
+    } foo;
 
     if (w->scrollbar.direction == 0)	/* if no StartScroll */
 	return;
@@ -841,7 +845,10 @@
     /* thumbProc is not pretty, but is necessary for backwards
        compatibility on those architectures for which it work{s,ed};
        the intent is to pass a (truncated) float by value. */
-    XtCallCallbacks(gw, XtNthumbProc, *(XtPointer*)&w->scrollbar.top);
+    
+    foo.xt_top = w->scrollbar.top;
+	
+    XtCallCallbacks(gw, XtNthumbProc, foo.xt_pt);
     XtCallCallbacks(gw, XtNjumpProc, (XtPointer)&w->scrollbar.top);
 
     PaintThumb(w);