Fixed frametime < 0 in videos while waiting for seek to complete.
Fixed frametime < 0 in videos while waiting for seek to complete.

svn path=/trunk/libavg/; revision=4773

th3infinity/libavg,hoodie/libavg,hoodie/libavg,libavg/libavg,yyd01245/libavg,th3infinity/libavg,libavg/libavg,th3infinity/libavg,yyd01245/libavg,scotty007/libavg,libavg/libavg,th3infinity/libavg,hoodie/libavg,libavg/libavg,yyd01245/libavg,yyd01245/libavg,scotty007/libavg,scotty007/libavg,scotty007/libavg,hoodie/libavg