stats: always free log
stats: always free log

We always want to free the open file log if fopen() succeeded. Independently
of if fgets() succeeds or fails.

CID 1326055

https://bugzilla.gnome.org/show_bug.cgi?id=756864

jpxiong/gstreamer,jpxiong/gstreamer,StreamUtils/gstreamer,jpxiong/gstreamer,centricular/gstreamer,StreamUtils/gstreamer,StreamUtils/gstreamer,centricular/gstreamer,StreamUtils/gstreamer,jpxiong/gstreamer,StreamUtils/gstreamer,centricular/gstreamer,jpxiong/gstreamer,centricular/gstreamer,centricular/gstreamer