vaapi-recorder: Don't loop trying to write on out of space condition

vaapi-recorder: Don't loop trying to write on out of space condition

The error handling for the function that writes the encoded frame on
the disk was bogus, always assuming the buffer supplied to the encoder
was too small. That would cause a bigger buffer to be allocated and
another attempt to encode the frame was done. In the case of a failure
to write to disk (due to ENOSPC, for instance) that would cause an
endless loop.

Possibly-related-to: https://bugs.freedesktop.org/show_bug.cgi?id=69330