Catch exception in __exit__

Author: PeterJohnson

wpilibc/src/main/python/semiwrap/Alert.yml

@@ -22,5 +22,9 @@ classes:
       })
       .def("__exit__", [](wpi::Alert &self, py::args args) {
         py::gil_scoped_release release;
-        self.Set(false);
+        try {
+          self.Set(false);
+        } catch (const std::runtime_error& e) {
+          // Ignore exceptions during cleanup
+        }
       })