large file support doesn't work in review mode

[andyzimmerman1]

When trying to review comskip txt files with associated video files larger than 2GB on linux (raspbian jessie), it is unable to open the source video file for review. I end up with a black screen where the video files should be. The timeline loads and I am still able to navigate through the file...

I was able to fix the issue by enabling large file support in platform.c (#define _LARGEFILE_SOURCE) and changing fopen to fopen64. You will probably want to do this conditionally based on the architecture.