In #50824 support was added for a package to include a disable_autoupdate flag to indicate that the plugin/theme should not be auto-updated even if a user had opted-in via the WP-Admin UI. However, the logic implementing the flag was inverted.
This commit repairs the logic. If a package has disable_autoupdate set, then it should not be auto-updated.
Props amisiewicz.
Fixes#52796.
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git-svn-id: http://core.svn.wordpress.org/trunk@57745 1a063a9b-81f0-0310-95a4-ce76da25c4cd
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