jpegdec: Fix progressive/interlaced detection
If input height and parsed one are identical, do not consider it as interlaced
Fixing below pipeline:
gst-launch-1.0 videotestsrc ! video/x-raw,format=I420,width=640,height=10
! jpegenc ! jpegparse ! jpegdec ! videoconvert ! autovideosink
Edited by Seungha Yang