Fixed read after delete of audio packet.
Fixed read after delete of audio packet.

svn path=/trunk/libavg/; revision=4769

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