Update win32 gitian libpng version #802

1. 
   TheBlueMatt commented at 3:38 am on February 6, 2012: member

   this is a self-reminder (and blocker for 0.6)
2. TheBlueMatt closed this on Feb 7, 2012

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3. ptschip referenced this in commit 7fb79a0691 on Oct 20, 2017
4. lateminer referenced this in commit ed0dd2a20a on Feb 19, 2019
5. MarcoFalke locked this on Sep 8, 2021

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