mxcl/homebrew — pull request #15762 by 2bits (2012-10-30 17:59:07+00:00)
Title: netpbm: upgrade devel, add stable Req

- Upgrade to the newer advanced revision 1755, version 10.60.02.
- Add a Requirement that stable be built on Snow Leopard only.
- Stable doesn't build on Lion or ML because it needs an old libpng
- Remove the patches for devel and HEAD that have been merged.
- Works with superenv

Fixes #15677