Update get_type to accept imported types as well

reid/src/mir/pass.rs

@@ -156,6 +156,15 @@ impl<Data: Clone + Default> Scope<Data> {
             .find(|(CustomTypeKey(n, _), _)| n == name)
             .map(|(key, _)| key)
     }
+
+    pub fn get_type(&self, typekey: &CustomTypeKey) -> Option<&TypeDefinition> {
+        self.types.get(&typekey).or(self
+            .types
+            .0
+            .iter()
+            .find(|(key, def)| key.0 == typekey.0 && def.importer == Some(typekey.1))
+            .map(|(_, v)| v))
+    }
 }
 
 #[derive(Clone, Debug)]

reid/src/mir/typecheck/mod.rs

@@ -300,8 +300,7 @@ impl TypeKind {
             TypeKind::CustomType(custom_type_key) => {
                 state
                     .scope
-                    .types
-                    .get(custom_type_key)
+                    .get_type(custom_type_key)
                     .map(|_| ())
                     .ok_or(ErrorKind::NoSuchType(
                         custom_type_key.0.clone(),