qtdemux: fix the condition when moov size is over maximal atom size

The original condition cause pipeline error even if the demuxer state
is MOVIE and got moov.
20 jobs for qtdemux_issues in 69 minutes and 17 seconds (queued for 9 minutes and 36 seconds)
latest
Status Job ID Name Coverage
  Preparation
passed #484888
gst indent

00:00:31

passed #484887
manifest

00:00:58

 
  Build
passed #484894
build cerbero android universal

00:13:07

passed #484895
build cerbero cross win32

00:14:07

passed #484896
build cerbero cross win64

00:06:44

passed #484893
build cerbero fedora x86_64

00:06:16

manual #484898
gst-ios-12.2 allowed to fail manual
build cerbero ios universal
passed #484897
gst-macos-10.14
build cerbero macos x86_64

00:07:28

passed #484889
build fedora x86_64

00:07:00

passed #484890
build nodebug fedora x86_64

00:05:56

passed #484891
build static fedora x86_64

00:14:51

passed #484892
build static nodebug fedora x86_64

00:12:11

 
  Test
passed #485034
check fedora

00:03:58

passed #484900
integration testsuites fedora

00:19:23

passed #484902
valgrind bad

00:09:20

passed #484903
valgrind ges

00:06:05

passed #484901
valgrind good

00:11:37

failed #484899
check fedora

00:05:20

 
  Integrate
passed #484904
android universal examples

00:06:52

passed #484905
documentation

00:05:33