Small cleanup

Change-Id: If46ef96f0ab64240b4811645f768844ad43ef48d
Reviewed-by: Simon Hausmann <simon.hausmann@digia.com>
Fixes to __qmljs_strict_equal

The implementation was broken if we had mixed int/double
values. In addition, this code should be slightly faster.

Change-Id: I5cf0c493902e33ed242c3ca7034fc369e840167f
Reviewed-by: Simon Hausmann <simon.hausmann@digia.com>