interlace: Fix too small buffer size error

Even though input/output resolutions are identical there, default
buffer size of progressive and interleaved formats could be different
because we are rounding up height of all plane of interlaced frame
to be multiple of two.

Part-of: <gstreamer/gst-plugins-bad!2270>
29 jobs for !2270 with backport-mr-2244-into-1.18-interlace-fix in 30 minutes and 52 seconds (queued for 4 seconds)
detached
Status Name Job ID Coverage
  Build Docker
passed alpine amd64 manifest builder docker #9940233

00:00:29

passed android docker #9940232

00:00:30

passed cerbero fedora amd64 docker #9940231

00:00:45

passed fedora amd64 docker #9940230

00:00:43

passed gst-indent amd64 docker #9940234

00:00:30

 
  Preparation
passed gst indent #9940236

00:00:19

passed manifest #9940235

00:00:28

 
  Build
passed build cerbero cross-android universal #9940245
gstreamer

00:08:39

passed build cerbero cross-ios universal #9940249
gst-ios-14.3

00:25:49

passed build cerbero cross win32 #9940246
gstreamer

00:07:28

passed build cerbero cross win64 #9940247
gstreamer

00:07:57

passed build cerbero fedora x86_64 #9940244
gstreamer

00:06:42

passed build cerbero macos x86_64 #9940248
gst-macos-11.1

00:14:20

passed build clang fedora x86_64 #9940240

00:04:46

manual build msys2 #9940243
docker windows 1809 allowed to fail manual
passed build nodebug fedora x86_64 #9940237

00:09:08

passed build static fedora x86_64 #9940238

00:09:13

passed build static nodebug fedora x86_64 #9940239

00:08:47

passed build vs2017 amd64 #9940241
docker windows 1809

00:10:35

passed build vs2017 x86 #9940242
docker windows 1809

00:10:21

 
  Test
passed check fedora #9940250
gstreamer

00:08:07

passed integration testsuites fedora 1/4 #9940251
gstreamer

00:12:27

passed integration testsuites fedora 2/4 #9940252
gstreamer

00:11:03

passed integration testsuites fedora 3/4 #9940253
gstreamer

00:12:01

passed integration testsuites fedora 4/4 #9940254
gstreamer

00:11:04

passed valgrind bad #9940255
gstreamer

00:09:40

 
  Integrate
passed cross-android universal examples #9940256

00:08:33

passed cross-ios universal examples #9940258
gst-ios-14.3

00:03:47

passed documentation #9940257

00:14:01