* lisp/subr.el (setq-default): Fix thinko

Reported by Johan Bockgård <bojohan+news@gnu.org>
1 job for master in 53 minutes and 20 seconds (queued for 2 seconds)
Status Job ID Name Coverage
  Test
failed #1250
test-all

00:53:20

 
Name Stage Failure
failed
test-all Test
Makefile:313: recipe for target 'check-doit' failed
make[2]: *** [check-doit] Error 1
make[2]: Leaving directory '/builds/emacs/emacs/test'
Makefile:288: recipe for target 'check-expensive' failed
make[1]: *** [check-expensive] Error 2
make[1]: Leaving directory '/builds/emacs/emacs/test'
Makefile:962: recipe for target 'check-expensive' failed
make: *** [check-expensive] Error 2
ERROR: Job failed: exit code 1