r600g,radeonsi: don't append to streamout buffers that haven't been used yet

The FILLED_SIZE counter is uninitialized at the beginning, so we can't use it.
Instead, use offset = 0, which is what we always do when not appending.

This unexpectedly fixes spec/ARB_texture_multisample/sample-position/*.
Yes, the test does use transform feedback.

Cc: 10.3 10.4 <[email protected]>
Reviewed-by: Glenn Kennard <[email protected]>
Reviewed-by: Michel Dänzer <[email protected]>

0 files changed, 0 insertions, 0 deletions