Core: Remove bogus assertion from dfb_surface_dump_buffer() to allow specification of just path (no numbering done).
Core: Remove bogus assertion from dfb_surface_dump_buffer() to allow specification of just path (no numbering done).

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