Remove non required arrayData() accesses from qv4arrayobject.cpp

Change-Id: Iaa012b85cad20fa3887c1308dd38d35da8c423b4
Reviewed-by: Simon Hausmann <simon.hausmann@digia.com>
Fix arrayData accesses in qv4lookup.cpp

Change-Id: I39a2e4f14afda2c0e909584682ef24a8b030025b
Reviewed-by: Simon Hausmann <simon.hausmann@digia.com>