liferay/liferay-portal — pull request #286 by zsoltbalogh (2012-11-27 00:52:15+00:00)
Title: LPS-31227 Applying a theme with a setting without value throws exception

Fixing the problem at two different places. Each one would be enough, however it's better if we are null-safe. If the settings page would be saved, it would always be an empty string (as the ParamUtil will get that value) so having a null value there is very exceptional.