code clean up


git-svn-id: http://emacspeak.googlecode.com/svn/trunk@8242 bb5eec90-091a-0410-bc89-db79c2cf2c7b
use condition-case to protect color->voice mapping

git-svn-id: http://emacspeak.googlecode.com/svn/trunk@8243 bb5eec90-091a-0410-bc89-db79c2cf2c7b