--- Xaw3d-1.5/xc/lib/Xaw3d/Scrollbar.c	Tue Oct 15 07:41:21 1996
+++ Xaw3d-1.5.ia64/xc/lib/Xaw3d/Scrollbar.c	Tue May  9 07:02:52 2000
@@ -1178,7 +1178,11 @@
     Cardinal *num_params;	/* unused */
 {
     register ScrollbarWidget sbw = (ScrollbarWidget) w;
-    float top = sbw->scrollbar.top;
+    union {
+	XtPointer pt;
+	float	  top;
+    } foo;
+    foo.top = sbw->scrollbar.top;
 
 #ifndef ARROW_SCROLLBAR
     if (sbw->scrollbar.direction == 0) return; /* if no StartScroll */
@@ -1204,10 +1208,10 @@
        there is no problem since in this case there is always a constant
        integer number of pixels the thumb must be moved in order to scroll
        to the next line/column. */
-    top += 0.0001;
+    foo.top += 0.0001;
 #endif
-    XtCallCallbacks (w, XtNthumbProc, *(XtPointer*)&top);
-    XtCallCallbacks (w, XtNjumpProc, (XtPointer)&top);
+    XtCallCallbacks (w, XtNthumbProc, foo.pt);
+    XtCallCallbacks (w, XtNjumpProc, (XtPointer)&sbw->scrollbar.top);
 }