izpack/izpack — pull request #42 by rkrell (2012-08-01 08:54:10+00:00)
Title: Fix for IZPACK-834 Possible NPE in ConfigurationInstallerListener due to unknown attribute values in configuration action specification file

Fixed also for other attributes of

where this can occur.
In future, there should be an error reported during compilation, if a semantic error in config-actions-spec.xml has been found. For now, make a user-understandable error meesage during installation instead of throwing a NPE on user level.