symbol's value as variable is void: gtags-auto-update

[bmag]

Looks like a recent commit introduced a bug.
gtags-auto-update is being accessed when it isn't defined, causing an error: "symbol's value as variable is void: gtags-auto-update".

Backtrace:

Debugger entered--Lisp error: (void-variable gtags-auto-update)
  (if (boundp (quote gtags-auto-update)) nil gtags-auto-update)
  (unless (boundp (quote gtags-auto-update)) gtags-auto-update)
  (and (unless (boundp (quote gtags-auto-update)) gtags-auto-update) drupal-drush-program (zerop (call-process drupal-drush-program nil nil nil "help" "etags")))
  eval((and (unless (boundp (quote gtags-auto-update)) gtags-auto-update) drupal-drush-program (zerop (call-process drupal-drush-program nil nil nil "help" "etags"))))
  byte-code("\303�\304N\211�\203�

Original issue reported in Spacemacs: syl20bnr/spacemacs#2153

[arnested]

I should not be no less not caring when doing double negations or something.

Thanks for the report.

Will do an official release right away.