a tiny bug in DehoistArrayIndex

R=mmassi@chromium.org

Review URL: https://codereview.chromium.org/15268009

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

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@14733 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

src/hydrogen.cc

@@ -5363,7 +5363,9 @@ static void DehoistArrayIndex(ArrayInstructionInterface* array_operation) {
     } else if (sub->right()->IsConstant()) {
       subexpression = sub->left();
       constant = HConstant::cast(sub->right());
-    } return;
+    } else {
+      return;
+    }
   } else {
     return;
   }