fix compilation (#359)

## Please complete the following:
just a compilation bug fix. npm run dev is how i test

## Please put your Discord username so you can be contacted if a bug or
regression is found:

respectful pinguin

src/core/execution/PortExecution.ts

@@ -79,7 +79,7 @@ export class PortExecution implements Execution {
       return;
     }
 
-    const ports = this.owner().tradingPorts(this.port);
+    const ports = this.player().tradingPorts(this.port);
 
     if (ports.length == 0) {
       return;