libavg_app: resolution parameter can be now empty, which defaults to screen resolution
libavg_app: resolution parameter can be now empty, which defaults to screen resolution

svn path=/branches/libavg_app/; revision=9052

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