Add missing include

Signed-off-by: Curtis Black <curtis.w.black@gmail.com>

Author: curtisblack

src/testrender/raytracer.h

@@ -14,7 +14,7 @@
 #include <OSL/dual_vec.h>
 #include <OSL/oslconfig.h>
 #include "bvh.h"
-
+#include "../testshade/render_state.h"
 
 #if OSL_USE_OPTIX
 #    include <optix.h>

src/testshade/render_state.h

@@ -47,6 +47,7 @@ class StackClosurePool {
         ptr         = (void*)(p + size);
         if (ptr <= &buffer[256])
             return (void*)p;
+        assert(false);
         return nullptr;
     }
 };