Added AVG_DUMP_TEST_FRAMES env var that logs the current frame number during tests.
Added AVG_DUMP_TEST_FRAMES env var that logs the current frame number during tests.

svn path=/trunk/libavg/; revision=4850

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