api: setz: Avoid an unwrap

Panicking is worse than failing.  Spotted this in passing.

Signed-off-by: Ian Jackson <ijackson@chiark.greenend.org.uk>

diff --git a/daemon/api.rs b/daemon/api.rs
index dd7756a9c34298068a8a7de08b0c9dd326f41a0a..4a59b5b68fd4ce1e44a903c2ed21323f47e759f3 100644 (file)
--- a/daemon/api.rs
+++ b/daemon/api.rs
@@ -456,7 +456,7 @@ api_route!{
   #[throws(ApiPieceOpError)]
   fn op(&self, a: ApiPieceOpArgs) -> PieceUpdate {
     let ApiPieceOpArgs { gs,piece, .. } = a;
-    let gpc = gs.pieces.byid_mut(piece).unwrap();
+    let gpc = gs.pieces.byid_mut(piece)?;
     if gpc.occult.is_active() {
       if self.z >= gpc.zlevel.z { throw!(Ia::Occultation) }
     }