fix(config-utilities): guard emacsql-close against nil sqlite handle

EmacSQL 4.3.1 registers a finalizer per connection that calls
emacsql-close after GC.  The sqlite-builtin and sqlite-module backends
clear their handle slot during an explicit close, so the finalizer
later runs emacsql-close on a closed connection and sqlite-close fires:

  finalizer failed: (wrong-type-argument sqlitep nil)

Adds an :around method on emacsql-close for both backends that
short-circuits when the handle is already nil.  Requires cl-generic
and eieio at the top of the file so the cl-defmethod forms expand.

0 files changed, 0 insertions, 0 deletions