bug#23938: Commit 237244bbd5ce753bcdf79634561de515bd76c687 broke display of composed characters on master

[Eli Zaretskii <eliz@gnu.org>]

> From: Clément Pit--Claudel <clement.pitclaudel@live.com>
> Date: Mon, 11 Jul 2016 01:33:38 +0200
> Cc: Paul Eggert <eggert@cs.ucla.edu>
> 
> Running the following in Emacs 24 and 25-rc pops a buffer displaying "bd". On master, it displays "b" and "d" on top of each other.
> 
>     (with-current-buffer (get-buffer-create "*test*")
>       (erase-buffer)
>       (fundamental-mode)
>       (insert "test")
>       (compose-region (point-min) (point-max) '(?b (Br . Bl) ?d))
>       (pop-to-buffer (current-buffer)))
> 
> Bisecting points to the following commit:
> 
>     237244bbd5ce753bcdf79634561de515bd76c687 is the first bad commit
>     commit 237244bbd5ce753bcdf79634561de515bd76c687
>     Author: Paul Eggert <eggert@cs.ucla.edu>
>     Date:   Mon May 30 16:09:25 2016 -0700
> 
>         Omit IF_LINT code that no longer seems needed
> 
>         Nowadays GCC is smarter, or the Emacs code has mutated, or both,
>         and now is as good a time as any to remove uses of IF_LINT that
>         now seem to be unnecessary.
>         (...)

Thanks, fixed.