Revert "actually disable C4995 and C4996 for udf.cpp"

This reverts commit 03ca3eff5fccbfe6bfc1583789d4fe91af8b1900.
update TreePropSheet from TortoiseSVN
fix warning
update ffmpeg (n0.8-17841-g868ac91)
Work around a libavresample crash
initialize variables (WIP)
do while (0) (WIP)