znerd/optipng-ant-task — pull request #8 by Olegas (2012-01-23 19:14:46+00:00)
Title: Incorrect task behaviour then process="try"

When doing optimization with process mode set to "try", even if OptiPNG reports failure, original file is copied anyway.
Current version of optipng-ant-task reports build as failed in the case, described above, but should not.
This pull request is aimed to fix this issue.