linux_input: Don't check quitpipe fd is select() was interrupted
linux_input: Don't check quitpipe fd is select() was interrupted

When select() is interrupted the fd sets are not updated so checking if
the fds are ready needs to be done after checking the return value.

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