lib: Assert that we do manage to submit at least one batch when measuring

As we measure the ring size, we never expect to find we can not submit
no batches at all. Assert against the unexpected.

Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Cc: Antonio Argenziano <antonio.argenziano@intel.com>
Reviewed-by: Antonio Argenziano <antonio.argenziano@intel.com>
1 file changed