[FFmpeg-devel] [MinGW] build FFplay without "-mwindows"

[Alessandro Grassi]

I think it's a good idea to remove the "-mwindows" switch when FFplay is
built under MinGW. Because of this switch, FFplay doesn't produce any
console output (like help, program info, codec parameters ...). I did it and
works OK, both a console window and a video/waveform window are created.

P.S. The same may apply to cygwin too, probably. I'm not sure since I only
use MinGW