wm: fixed build, added missing variable "DFBResult ret"
wm: fixed build, added missing variable "DFBResult ret"

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