Temporary patch for shader destruction to prevent assert at end of program.
Temporary patch for shader destruction to prevent assert at end of program.

svn path=/trunk/libavg/; revision=3591

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