[wp-meta] [Making WordPress.org] #4858: Add guard clauses for themes repo package

[Making WordPress.org]

#4858: Add guard clauses for themes repo package
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 Reporter:  dingo_d          |      Owner:  (none)
     Type:  enhancement      |     Status:  new
 Priority:  normal           |  Milestone:
Component:  Theme Directory  |   Keywords:  has-patch dev-feedback
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 Locally when running the meta repository in VVV I got errors when creating
 fake theme packages where version, theme url, author url and ticket id go.
 Also the status (which is stored in the post meta is also not defined).

 This patch adds guard clauses that prevent these errors from occurring
 locally.

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Ticket URL: <https://meta.trac.wordpress.org/ticket/4858>
Making WordPress.org <https://meta.trac.wordpress.org/>
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