In `image_size_input_fields()`:

* Declare `$out` as an empty array - this is not a strict PHP requirement, but is a good practice before loops
* Most of this function was tabbed twice, instead of once

See #30799.

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git-svn-id: http://core.svn.wordpress.org/trunk@30967 1a063a9b-81f0-0310-95a4-ce76da25c4cd
For clarity, initialize some arrays that previously were only assigned via short circuit in loops.

See #30799.

Built from https://develop.svn.wordpress.org/trunk@30982


git-svn-id: http://core.svn.wordpress.org/trunk@30968 1a063a9b-81f0-0310-95a4-ce76da25c4cd