try to fix the cuda build

Author: ericniebler

include/nvexec/stream/when_all.cuh

@@ -475,7 +475,7 @@ namespace nvexec::_strm {
       // Could be non-atomic here and atomic_ref everywhere except __completion_fn
       std::atomic<_when_all::disposition> state_{_when_all::started};
 
-      _errors_t errors_{};
+      _errors_t errors_{__no_init};
       _child_values_t* values_{};
       inplace_stop_source stop_source_{};