DATA-1215
Added the conditional modifier to Stealth, as pointed in the mailing list.

git-svn-id: svn+ssh://svn.code.sf.net/p/pcgen/code/Trunk@21042 ef53c05b-3124-4d59-ae7d-fe3273f42be7

https://github.com/pcgen/pcgen/commit/d4a002b