When uploading MJPEG data to VA-API, do it directly into the buffer.

[nageru] / nageru / bmusb

diff --git a/nageru/bmusb b/nageru/bmusb
index 5163d25c65c3028090db1aea6587ec2fb4cb823e..03e38890b599efe6ac906fdb70b43cda63f11d01 160000 (submodule)
--- a/nageru/bmusb
+++ b/nageru/bmusb
@@ -1 +1 @@
-Subproject commit 5163d25c65c3028090db1aea6587ec2fb4cb823e
+Subproject commit 03e38890b599efe6ac906fdb70b43cda63f11d01