[util] Added dfb_region_region_extends() returning true if both regions' number of pixels added equals to number of pixels of their bounding box.
[util] Added dfb_region_region_extends() returning true if both regions' number of pixels added equals to number of pixels of their bounding box.

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