bug#24749: Making sure syntax-propertize is called

[Eli Zaretskii]

> From: Stefan Monnier <monnier@IRO.UMontreal.CA>
> Cc: 24749@debbugs.gnu.org
> Date: Fri, 21 Oct 2016 12:34:27 -0400
> 
> I think I may have described it incorrectly: the issue that it solves is
> one that's been around forever.  It's just that 25.1 fixes this issue in
> most cases and hence creates a new expectations that the issue is fixed,
> but there's still a hole if you try to use navigation commands before
> any syntax-propertize call, which this patch intends to fix.
> 
> So I don't think this is urgent, and since the fix (whichever we choose)
> affects (by nature) "all" modes, I don't think it's safe enough for
> emacs-25.

Fine, then master it is.