Nicolas Dufresne authored Sep 16, 2021 and GStreamer Marge Bot committed Sep 17, 2021

Our code does not support rendering twice the same wl_buffer in a row, so it
tries to skip that case, but for this it relied on the GstBuffer pointer,
while the cache actually works at the GstMemory level now. To avoid this
compare the GstWlBuffer instead.

This fixes crash when use in zero-copy with videorate element.

Part-of: <!2526>