Tags: crocdialer/vierkant

imgui: guard empty renderer-statistics

- fix segfault drawing PBRDeferred stats before the first frame
- copy last statistics, zeroed when history is empty
- skip culling- and timing-plots when there are no samples

radv-issues caused by github.com/shader-slang/slang/issues/9849

- use spirv_asm workaround until we got a fixed slangc

Fix a copy/lifetime issue introduced in last commit