Submit Albrecht's minimal fix for str2082 - this "fixes" the erroneous window animations

src/Fl_x.cxx

@@ -1587,6 +1587,13 @@ void Fl_X::make_xid(Fl_Window* win, XVisualInfo *visual, Colormap colormap)
     XSetWMHints(fl_display, xp->xid, hints);
     XFree(hints);
   }
+ 
+  // set the window type for menu and tooltip windows to avoid animations (compiz)
+  if (win->menu_window() || win->tooltip_window()) {
+   Atom net_wm_type = XInternAtom(fl_display, "_NET_WM_WINDOW_TYPE", False);
+    Atom net_wm_type_kind = XInternAtom(fl_display, "_NET_WM_WINDOW_TYPE_MENU", False);
+    int ret = XChangeProperty(fl_display, xp->xid, net_wm_type, XA_ATOM, 32, PropModeReplace, (unsigned char*)&net_wm_type_kind, 1);
+  }
 
   XMapWindow(fl_display, xp->xid);
   if (showit) {