[MacPorts] #14578: ImageMagick: Fix alpha channel bug in PDF generation and upgrade to 6.3.9-2

[MacPorts]

#14578: ImageMagick: Fix alpha channel bug in PDF generation and upgrade to 6.3.9-2
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  Reporter:  ricci at macports.org  |       Owner:  ryandesign at macports.org
      Type:  defect              |      Status:  new                    
  Priority:  Normal              |   Milestone:  Port Bugs              
 Component:  ports               |     Version:  1.6.0                  
Resolution:                      |    Keywords:                         
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Comment (by ricci at macports.org):

 Replying to [comment:2 ryandesign at macports.org]:
 > Where did this patch come from? Is there an upstream bugreport for this
 already?

 I made the patch after walking through the coders/pdf.c to see where it
 writes out the SMask reference information and (reasonably carefully)
 counting new object outputs from there until the alpha channel information
 is written.  I believe the patch is correct, though having another set of
 eyes on it would be all good.
 Upstream has a bug for this, see <http://www.imagemagick.org/discourse-
 server/viewtopic.php?f=3&t=9202>.

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Ticket URL: <http://trac.macosforge.org/projects/macports/ticket/14578#comment:4>
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