bug#29142: 26.0.90: empty tooltips with flymake

[Charles A. Roelli]

> From: joaotavora@gmail.com (João Távora)
> Date: Sun, 05 Nov 2017 15:00:29 +0000
> 
> charles@aurox.ch (Charles A. Roelli) writes:
> 
> > M-x find-library-other-window RET autoinsert RET
> > M-x flymake-mode RET
> > M-x flymake-goto-next-error RET
> > C-x o
> >
> > Now place the mouse over the underlined text in the window showing
> > buffer autoinsert.el, without selecting the window.  An empty tooltip
> > shows.  If you select the window and then place the mouse over the
> > underlined text, the tooltip text shows up.
> >
> Thanks. Should be fixed now (a2cc6d74c5b94633e7fc044765e0ef40a8d63f50)

Thanks!