Figure out whether sanity check in Aux serialisation should be re-introduced

[psychon]

I just noticed the following change in ecdc405 in xproto.rs and I feel like that is wrong. Since I don't have the time to investigate this right now, I am simply opening this ticket instead.

@@ -5548,7 +6920,7 @@ impl CreateWindowAux {
         result
     }
     fn serialize_into(&self, bytes: &mut Vec<u8>, value_mask: u32) {
-        assert_eq!(self.switch_expr(), value_mask, "switch `value_list` has an inconsistent discriminant");
+        let _ = value_mask;
         if let Some(background_pixmap) = self.background_pixmap {
             background_pixmap.serialize_into(bytes);
         }
@@ -6099,7 +7471,7 @@ impl ChangeWindowAttributesAux {
         result
     }
     fn serialize_into(&self, bytes: &mut Vec<u8>, value_mask: u32) {
-        assert_eq!(self.switch_expr(), value_mask, "switch `value_list` has an inconsistent discriminant");
+        let _ = value_mask;
         if let Some(background_pixmap) = self.background_pixmap {
             background_pixmap.serialize_into(bytes);
         }