`wp_version_check()`, `wp_update_plugins()` and `wp_update_themes()` are all originally hooked to the `upgrader_process_complete` action with zero arguments passed to them. Zero arguments should be passed when re-adding them after translation updates, otherwise the sky will fall.
Merge of [38415] to the 4.6 branch.
Props ionutst, gitlost, swissspidy.
Fixes#37731.
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git-svn-id: http://core.svn.wordpress.org/branches/4.6@38416 1a063a9b-81f0-0310-95a4-ce76da25c4cd
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