Sprinkle some Send

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

diff --git a/src/gamestate.rs b/src/gamestate.rs
index 42545976d2de3375d5b13aff3539f5d3303e4f27..643047cc0d380d79ff8c0e10302aa0f065f56d6a 100644 (file)
--- a/src/gamestate.rs
+++ b/src/gamestate.rs
@@ -193,7 +193,7 @@ pub struct PieceSpecLoaded {
 }
 
 #[typetag::serde(tag="type")]
-pub trait PieceSpec: Debug + Send + 'static {
+pub trait PieceSpec: Debug + Sync + Send + 'static {
   fn count(&self) -> usize { 1 }
   fn load(&self, i: usize, gpc: &mut GPiece, ir: &InstanceRef)
           -> Result<PieceSpecLoaded, SpecError>;