[MacPorts] #28197: vrpn: update to 7.28

[MacPorts]

#28197: vrpn: update to 7.28
-------------------------------------+--------------------------------------
 Reporter:  ryandesign@…             |       Owner:  sean@…         
     Type:  update                   |      Status:  new            
 Priority:  Normal                   |   Milestone:                 
Component:  ports                    |     Version:                 
 Keywords:                           |        Port:  vrpn           
-------------------------------------+--------------------------------------

Comment(by sean@…):

 Portfile attached for 7.29 which resolves the previous build issues.  It
 requires a build out of source, so some other Portfile changes were
 necessary.

-- 
Ticket URL: <https://trac.macports.org/ticket/28197#comment:5>
MacPorts <http://www.macports.org/>
Ports system for Mac OS