Jeremy Felt 0b9a437317 Make $blog_id explicitly global.
`$blog_id` is used in both single and multisite configurations as a global variable, though has never been explicitly marked as such in the global scope. This can cause confusion depending on how core is loaded.

Fixes #34217.


git-svn-id: https://develop.svn.wordpress.org/trunk@34961 602fd350-edb4-49c9-b593-d223f7449a82
2015-10-08 21:44:11 +00:00
2015-10-08 21:44:11 +00:00
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