gconvert: Use a pointer array in extract_uris

Use a GPtrArray instead of a GSList in g_uri_list_extract_uris().
14 jobs for g_uri_list_extract_uris-use-pointer-array in 40 minutes and 47 seconds
Status Job ID Name Coverage
  Style Check
passed #794359
check-todos

00:01:10

passed #794358
style-check-diff

00:01:02

 
  Build
passed #794364
cross-android_api21_arm64

00:03:16

passed #794365
cross-android_api28_arm64

00:02:12

passed #794366
cross-mingw64

00:06:15

passed #794361
debian-stable-x86_64

00:02:49

passed #794360
fedora-x86_64

00:09:29

passed #794363
G_DISABLE_ASSERT

00:09:25

passed #794362
installed-tests

00:05:09

passed #794367
win32-ps
msys2-mingw32

00:05:52

passed #794368
win32-ps
vs2017-x64

00:07:58

 
  Coverage
passed #794369
coverage

00:02:24

78.3%
 
  Analysis
passed #794371
scan-build

00:26:25

failed #794370
allowed to fail
valgrind

00:12:48

 
Name Stage Failure
failed
valgrind Analysis
Uploading artifacts...
_build/config.h: found 1 matching files

_build/glib/glibconfig.h: found 1 matching files

_build/meson-logs: found 7 matching files

Uploading artifacts to coordinator... ok
id=794370 responseStatus=201 Created token=kXNxt-2u
Uploading artifacts...
_build/valgrind-report.xml: found 1 matching files

Uploading artifacts to coordinator... ok
id=794370 responseStatus=201 Created token=kXNxt-2u
ERROR: Job failed: exit code 1