mxcl/homebrew — pull request #16594 by dpoon (2012-12-16 07:02:54+00:00)
Title: autotrace: patch for #16569

autotrace fails to build because libpng changed its API between 1.4 and 1.5.
Apply a patch from MacPorts to fix this. Thanks to adamv for the solution.

Closes #16569.