validate: plug leak in gssdp

These is triggered by the webrtcbin tests

https://gitlab.gnome.org/GNOME/gssdp/-/issues/10
34 jobs for alatiera/fedora-rebuild-debug in 26 seconds (queued for 5 seconds)
Status Job ID Name Coverage
  Build Docker
passed #4517341
alpine amd64 manifest builder docker

00:00:12

passed #4517340
android docker

00:00:12

passed #4517339
cerbero fedora amd64 docker

00:00:12

passed #4517338
fedora amd64 docker

00:00:17

passed #4517342
gst-indent amd64 docker

00:00:12

 
  Preparation
passed #4517344
gst indent

00:00:09

manual #4517343
manual
manifest
 
  Build
created #4517353
gstreamer
build cerbero cross-android universal
created #4517357
gst-ios-13.2
build cerbero cross-ios universal
created #4517354
gstreamer
build cerbero cross win32
created #4517355
gstreamer
build cerbero cross win64
created #4517352
gstreamer
build cerbero fedora x86_64
created #4517356
gst-macos-10.15
build cerbero macos x86_64
created #4517348
build clang fedora x86_64
created #4517351
1809 windows docker allowed to fail manual
build msys2
created #4517345
build nodebug fedora x86_64
created #4517346
build static fedora x86_64
created #4517347
build static nodebug fedora x86_64
created #4517349
1809 windows docker
build vs2017 amd64
created #4517350
1809 windows docker
build vs2017 x86
 
  Test
created #4517358
gstreamer
check fedora
created #4517359
gstreamer
integration testsuites fedora 1/4
created #4517360
gstreamer
integration testsuites fedora 2/4
created #4517361
gstreamer
integration testsuites fedora 3/4
created #4517362
gstreamer
integration testsuites fedora 4/4
created #4517367
gstreamer
valgrind bad
created #4517364
gstreamer
valgrind base
created #4517363
gstreamer
valgrind core
created #4517368
gstreamer
valgrind ges
created #4517365
gstreamer
valgrind good
created #4517366
gstreamer
valgrind ugly
 
  Integrate
created #4517369
cross-android universal examples
created #4517371
gst-ios-13.2
cross-ios universal examples
created #4517370
documentation