Revert "Core: Reset flip counter to zero when changing buffer mode."
Revert "Core: Reset flip counter to zero when changing buffer mode."

This reverts commit 33fbf251e2d87ea2653260a010737b77e28b1518.

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