Remove two cases of needlessly jumping to the next instruction.  The jump eliminator will remove these cases, but it's easy enough to just do statically in the code, and not require the eliminator to do it at runtime.

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@391 ce2b1a6d-e550-0410-aec6-3dcde31c8c00