[MacPorts] #49359: tdom: fix build failure with tcl 8.6

[MacPorts]

#49359: tdom: fix build failure with tcl 8.6
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  Reporter:  neumann@…  |      Owner:  macports-tickets@…
      Type:  defect     |     Status:  new
  Priority:  Normal     |  Milestone:
 Component:  ports      |    Version:  2.3.4
Resolution:             |   Keywords:  haspatch maintainer
      Port:  tdom       |
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Comment (by ryandesign@…):

 The portfile you've attached here looks like it's based on the one you
 originally submitted in #32899, and does not take into account the fixes
 that Josh put in when he committed the port in r95442. Please base your
 changes off the latest version in the repository instead.

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Ticket URL: <https://trac.macports.org/ticket/49359#comment:2>
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