Clean up the redundant Int32Constant check which is covered by double case

BUG=
R=jkummerow@chromium.org

Review URL: https://codereview.chromium.org/22815032

Patch from Weiliang Lin <weiliang.lin2@gmail.com>.

git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@16282 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
grokdump: fix Oddball printing

R=bmeurer@chromium.org

Review URL: https://codereview.chromium.org/22852021

git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@16283 ce2b1a6d-e550-0410-aec6-3dcde31c8c00