_WIN32 and_WIN64 are defined automatically by MinGW 4.8.3

Cleaned up an unnecessary define of _WIN32 and _WIN64

vfw32 is the name of the 64 bit version of vfw32, removed obsolete
if/else

Change-Id: Ib89767c4424abf85596bb56f8f1c7c9a2621cd83
1 file changed