winex11: Ignore EnterNotify events that are older than the last mouse wrap.

dlls/winex11.drv/mouse.c

@@ -1621,6 +1621,11 @@ void X11DRV_EnterNotify( HWND hwnd, XEvent *xev )
     input.u.mi.time        = EVENT_x11_time_to_win32_time( event->time );
     input.u.mi.dwExtraInfo = 0;
 
+    if (is_old_motion_event( event->serial ))
+    {
+        TRACE( "pos %d,%d old serial %lu, ignoring\n", input.u.mi.dx, input.u.mi.dy, event->serial );
+        return;
+    }
     send_mouse_input( hwnd, event->window, event->state, &input );
 }