bug#19452: 24.4; sql-connect fails in first invocation: "Attempt to set a constant symbol: nil"

[Eli Zaretskii]

> From: Nicolas Petton <nicolas@petton.fr>
> Date: Tue, 26 Jul 2016 17:11:41 +0200
> 
> > Yeah, thanks. I just didn't bother to change what was there originally. 
> > There's a lot more of them there too.
> 
> I fixed them in master (you'll need to update your patch).

Thanks.  When you compiled sql.el, did you see the warning below?

  In sql-end-of-statement:
  progmodes/sql.el:2781:31:Warning: looking-back called with 1 argument, but
      requires 2-3