gst/deinterlace/gstdeinterlace.c: Rowstride fixes. Fixes #161039.

gst/deinterlace/gstdeinterlace.c: Rowstride fixes. Fixes #161039.

Original commit message from CVS:
Reviewed by:  Ronald S. Bultje  <rbultje@ronald.bitfreak.net>
* gst/deinterlace/gstdeinterlace.c: (gst_deinterlace_link),
(gst_deinterlace_chain):
Rowstride fixes. Fixes #161039.
* gst/videocrop/gstvideocrop.c: (gst_video_crop_init),
(gst_video_crop_get_property), (gst_video_crop_add_to_struct_val),
(gst_video_crop_getcaps), (gst_video_crop_link),
(gst_video_crop_i420), (gst_video_crop_chain),
(gst_video_crop_change_state):
Rework of negotiation. Actually works now. Fixes #158650.