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

[Nikolay Kudryavtsev]

Yeah, thanks. I just didn't bother to change what was there originally. 
There's a lot more of them there too.

Looking at vc history, sql.el got infested by those sharp-quoted lambdas 
relatively recently, in 2013, at e18e61cf276880f658ab8cdf1f242a675b58cd71.

And I honestly can't blame the author for that. Even the current Elisp 
reference is a bit unclear on the use of sharp-quotes.

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Best Regards,
Nikolay Kudryavtsev