file: redefine fileno to _fileno for vs8
file: redefine fileno to _fileno for vs8

fileno was deprecated in Visual C++ 2005. Redefined to use the
ISO C++ name

stuarthicks/libmxf,ebu/ebu-libmxf,stuarthicks/libmxf,stuarthicks/libmxf,ebu/ebu-libmxf,Limecraft/ebu-libmxf,ebu/ebu-libmxf,stuarthicks/libmxf,ebu/ebu-libmxf,Limecraft/ebu-libmxf,Limecraft/ebu-libmxf