Core: Check surface identity when looking up surface.
Core: Check surface identity when looking up surface.

deniskropp/DirectFB,Distrotech/DirectFB,sklnet/DirectFB,dfbdok/DirectFB1,DirectFB/directfb,kaostao/directfb,kevleyski/directfb,kevleyski/directfb,mtsekm/test,sklnet/DirectFB,Distrotech/DirectFB,jcdubois/DirectFB,deniskropp/DirectFB,jcdubois/DirectFB,dfbdok/DirectFB1,kevleyski/DirectFB-1,kevleyski/directfb,mtsekm/test,djbclark/directfb-core-DirectFB,lancebaiyouview/DirectFB,deniskropp/DirectFB,kevleyski/directfb,djbclark/directfb-core-DirectFB,sklnet/DirectFB,kevleyski/DirectFB-1,kaostao/directfb,mtsekm/test,DirectFB/directfb,djbclark/directfb-core-DirectFB,djbclark/directfb-core-DirectFB,lancebaiyouview/DirectFB,kevleyski/DirectFB-1,Distrotech/DirectFB,deniskropp/DirectFB,DirectFB/directfb,lancebaiyouview/DirectFB,kaostao/directfb,dfbdok/DirectFB1,kevleyski/DirectFB-1,lancebaiyouview/DirectFB,sklnet/DirectFB,jcdubois/DirectFB