[MacPorts] #54128: lint failed with license unset

[MacPorts]

#54128: lint failed with license unset
--------------------+-------------------
 Reporter:  l2dy    |      Owner:
     Type:  defect  |     Status:  new
 Priority:  Normal  |  Milestone:
Component:  base    |    Version:  2.4.1
 Keywords:          |       Port:
--------------------+-------------------
 Normally it would be
 {{{
 Warning: no license set
 }}}

 But if license was specified then unset,
 {{{
 --->  Verifying Portfile for dbus-python24
 Error: Missing required variable: categories
 Error: Missing required variable: license
 Error: Failed to lint dbus-python24: can't read "license": no such
 variable
 Error: Follow https://guide.macports.org/#project.tickets to report a bug.
 Error: Processing of port dbus-python24 failed
 }}}

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Ticket URL: <https://trac.macports.org/ticket/54128>
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