Pascal Birchler 8ae6705fd2 Media: Simplify upload error message construction.
Merges [40736] to the 3.7 branch.

Built from https://develop.svn.wordpress.org/branches/3.7@40747


git-svn-id: http://core.svn.wordpress.org/branches/3.7@40605 1a063a9b-81f0-0310-95a4-ce76da25c4cd
2017-05-16 18:05:51 +00:00
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