Add guard against self assignment.
authormmassi@chromium.org <mmassi@chromium.org@ce2b1a6d-e550-0410-aec6-3dcde31c8c00>
Mon, 11 Jun 2012 11:25:10 +0000 (11:25 +0000)
committermmassi@chromium.org <mmassi@chromium.org@ce2b1a6d-e550-0410-aec6-3dcde31c8c00>
Mon, 11 Jun 2012 11:25:10 +0000 (11:25 +0000)
commitd9f393d1c97ab93581f28d6ddbeddb6274036bfe
treec1304a8d548efaa93966882bbc511346f283b327
parente98fb1028b8948f8601d718b16f32f5866558cef
Add guard against self assignment.

BUG=
TEST=

Review URL: https://chromiumcodereview.appspot.com/10537024

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@11756 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
src/hydrogen.cc