Trace crash through portals

[ThisAMJ]

Record a trace then draw it with some portal recursion goin on n stuff

[Krzyhau]

The issue occurs when translucent mesh of player trace bounding box is attempted to be drawn after first depth of portal rendering (basically when looking through recursive portal with r_portal_stencil_depth bigger than 1). SAR is causing a crash because supposedly vertex data buffer seems to not be allocated properly by material system's render context (it's just nullptr when I debugged it). However, I'm afraid there's probably something much worse going on in the game itself, because even after safe-guarding that issue I'm getting crashes from engine.dll later on which I am unable to locate so far.