Don't copy the argument in SafeMatcherCast because it's not safe.


git-svn-id: http://googlemock.googlecode.com/svn/trunk@459 8415998a-534a-0410-bf83-d39667b30386
pulls in gtest r668

git-svn-id: http://googlemock.googlecode.com/svn/trunk@460 8415998a-534a-0410-bf83-d39667b30386