fixed #320 issue

common/utils/T/tracer/gui/test.c

@@ -22,13 +22,7 @@ int main(void)
   widget_add_child(g, c1, c2, 0);
 
   plot = new_xy_plot(g, 100, 100, "xy plot test", 30);
-#if 0
-  c2 = new_container(g, HORIZONTAL);
-  widget_add_child(g, c2, plot, -1);
-  widget_add_child(g, c1, c2, -1);
-#else
   widget_add_child(g, c1, plot, -1);
-#endif
 
   tlcol = new_color(g, "#ddf");
   tl = new_textlist(g, 300, 10, tlcol);