23.0.0; window-system does not exist as variable

[Peter Dyballa]

Hello!

After a cvs update, 'make bootstrap' does not succeed, because:

        Symbol's value as variable is void: window-system

It's line #439 in lisp/cus-start.el that needs to be changed. The line

                       (eq window-system 'mac))

should be changed to

                       (featurep 'mac-carbon))


--
Greetings

  Pete

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