add test

Author: b-naber

src/test/ui/const-generics/issues/issue-97634.rs

@@ -0,0 +1,10 @@
+//build-pass
+
+pub enum Register<const N: u16> {
+    Field0 = 40,
+    Field1,
+}
+
+fn main() {
+    let _b = Register::<0>::Field1 as u16;
+}