vulkan: return VK_NOT_READY when no queries are available

Fixes a validation issue.
The issue is that the function gets called before we've sumitted a frame
for decoding to that context. However, we cannot run queries before
they've been reset, which happens at submission time.
As we'd need to otherwise run a command queue at init-time, just check
if submissions have happened.

0 files changed, 0 insertions, 0 deletions