rtpjitterbuffer: Clear clock master before unreffing

Make sure to clear any master clock on the media_clock
before unreffing it to release the timer callback that's
updating the clock and keeping it reffed.
19 jobs for backport-mr-244-into-1.16-rtpjitterbuffer-clear-clock-master in 103 minutes and 1 second (queued for 34 seconds)
Status Job ID Name Coverage
  Preparation
passed #517570
gst indent

00:00:40

passed #517569
manifest

00:01:00

 
  Build
passed #517576
build cerbero android universal

00:12:33

passed #517577
build cerbero cross win32

00:07:53

passed #517578
build cerbero cross win64

00:05:30

passed #517575
build cerbero fedora x86_64

00:06:18

passed #517580
gst-ios-12.2
build cerbero ios universal

00:38:34

passed #517579
gst-macos-10.14
build cerbero macos x86_64

00:08:26

passed #517571
build fedora x86_64

00:12:45

passed #517572
build nodebug fedora x86_64

00:08:10

passed #518493
build static fedora x86_64

00:11:40

passed #517574
build static nodebug fedora x86_64

00:16:11

failed #517573
build static fedora x86_64

00:17:02

 
  Test
passed #517581
check fedora

00:03:48

passed #517582
integration testsuites fedora

00:09:00

passed #517584
valgrind bad

00:07:56

passed #517585
valgrind ges

00:05:23

passed #517583
valgrind good

00:08:49

 
  Integrate
passed #517586
android universal examples

00:09:32