core: fix home_domain

packages/hydrooj/src/handler/home.ts

@@ -282,7 +282,7 @@ class HomeDomainHandler extends Handler {
             ['home_domain', null],
         ];
         let ddocs: DomainDoc[];
-        let dudict: Record<string, DomainDoc>;
+        let dudict: Record<string, DomainDoc> = {};
         if (!this.user.hasPriv(PRIV.PRIV_VIEW_ALL_DOMAIN)) {
             dudict = await domain.getDictUserByDomainId(this.user._id);
             const dids = Object.keys(dudict);