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

This reverts commit 03ca3eff5fccbfe6bfc1583789d4fe91af8b1900.
build.bat, mpc-hc_setup.iss : add ICL13 support
use the _countof macro when it makes sense to do so
update ffmpeg (n0.8-18462-g0501d06)
Cppcheck fixes (WIP)