[MacPorts] #46203: update armadillo to 4.550.2

[MacPorts]

#46203: update armadillo to 4.550.2
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 Reporter:  christian.frisson@…  |      Owner:  macports-tickets@…
     Type:  defect               |     Status:  new
 Priority:  Normal               |  Milestone:
Component:  ports                |    Version:  2.3.3
 Keywords:                       |       Port:  armadillo
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 The current MacPorts version of armadillo (4.450) has a bug:
 /opt/local/include/armadillo_bits/gmm_diag_meat.hpp:292:0
 /opt/local/include/armadillo_bits/gmm_diag_meat.hpp:292: warning:
 declaration of 'n_dims' shadows a member of 'this'

 This was fixed in Armadillo 4.550.

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Ticket URL: <https://trac.macports.org/ticket/46203>
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