Drop constexpr to work around gcc 5 compiler bug
Drop constexpr to work around gcc 5 compiler bug

baldurk/renderdoc,baldurk/renderdoc,baldurk/renderdoc,Zorro666/renderdoc,baldurk/renderdoc,baldurk/renderdoc,baldurk/renderdoc,Zorro666/renderdoc,Zorro666/renderdoc,Zorro666/renderdoc,Zorro666/renderdoc,Zorro666/renderdoc