hg: openjfx/8u-dev/rt: 8198316: MediaPlayer crashes when playing m3u8 files on macOS High Sierra 10.13.2

[alexander.matveev at oracle.com]

Changeset: bbefff9d8dd2
Author:    almatvee
Date:      2018-02-16 16:10 -0800
URL:       http://hg.openjdk.java.net/openjfx/8u-dev/rt/rev/bbefff9d8dd2

8198316: MediaPlayer crashes when playing m3u8 files on macOS High Sierra 10.13.2
Reviewed-by: kcr

! modules/media/src/main/native/jfxmedia/platform/osx/avf/AVFMediaPlayer.h
! modules/media/src/main/native/jfxmedia/platform/osx/avf/AVFMediaPlayer.mm