fixed cfg on launch params

Author: trigpolynom

examples/cuda/gpu/path_tracer_gpu/src/optix.rs

@@ -20,7 +20,7 @@ use optix_device::{
 };
 
 extern "C" {
-    #[cfg(target_os = "cuda")]
+    #[cfg_attr(target_os = "cuda", nvvm_internal::addrspace(4))]
     static PARAMS: LaunchParams<'static>;
 }