[MacPorts] #35946: graphviz fails to compile after updating to libpng 1.5

[MacPorts]

#35946: graphviz fails to compile after updating to libpng 1.5
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 Reporter:  hugo.at.ribeiro@…          |       Owner:  macports-tickets@…                   
     Type:  defect                     |      Status:  new                                  
 Priority:  Normal                     |   Milestone:                                       
Component:  ports                      |     Version:  2.1.2                                
 Keywords:                             |        Port:                                       
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Comment(by robsonpeixoto@…):

 This work for me:

 $ port installed graphviz
 The following ports are currently installed:
   graphviz @2.28.0_5+gdk_pixbuf+glitz+rsvg (active)

 $ port deps graphviz +gdk_pixbuf+glitz+rsvg | grep Library | cut -d' '
 -f3- | tr ',' ' '
 jpeg  libpng  libLASi  fontconfig  freetype  expat  gd2  gts  ghostscript
 zlib  gettext  librsvg  gtk2  glitz

 $ sudo port upgrade $(port deps graphviz +gdk_pixbuf+glitz+rsvg | grep
 Library | cut -d' ' -f3- | tr ',' ' ')

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Ticket URL: <https://trac.macports.org/ticket/35946#comment:3>
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