[MacPorts] #53445: port:mlt/mlt-qt5 fixes

[MacPorts]

#53445: port:mlt/mlt-qt5 fixes
--------------------------+---------------------------------
  Reporter:  RJVB         |      Owner:  ddennedy
      Type:  enhancement  |     Status:  closed
  Priority:  Normal       |  Milestone:
 Component:  ports        |    Version:
Resolution:  fixed        |   Keywords:  haspatch maintainer
      Port:  mlt          |
--------------------------+---------------------------------
Changes (by jmroot):

 * cc: raimue (added)


Comment:

 The mlt-qt5 port fails to parse after this change when you don't have qt5
 installed:
 {{{
 % port info mlt-qt5
 Error: Unable to open port: Package Qt5Core was not found in the pkg-
 config search path.
 Perhaps you should add the directory containing `Qt5Core.pc'
 to the PKG_CONFIG_PATH environment variable
 No package 'Qt5Core' found
 }}}

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Ticket URL: <https://trac.macports.org/ticket/53445#comment:8>
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