Fixes build failures on a future release train.

    Fixes build failures on a future release train.

        Reviewed by Maciej.

        Test cases added: (None needed.)

        * kwq/KWQPointArray.h: check if NSPoint is the same as CGPoint
        * kwq/KWQPoint.mm: ditto
        * kwq/KWQRect.h: check if NSRect is the same as CGRect
        * kwq/KWQRect.mm: ditto
        * kwq/KWQSize.h: check if NSSize is the same as CGSize
        * kwq/KWQSize.mm: ditto

git-svn-id: https://svn.webkit.org/repository/webkit/trunk@10665 268f45cc-cd09-0410-ab3c-d52691b4dbfc