mxcl/homebrew — pull request #17823 by mcroydon (2013-02-13 22:08:02+00:00)
Title: Updated pngcrush url and sha1 from 1.7.47 to 1.7.49.

1.7.47 has been removed from the Sourceforge download site. 1.7.49 is the most up to date release on Sourceforge.