fix(components): fix empty head

Author: ThornWalli

src/runtime/components/BoosterImage/Base.vue

@@ -102,6 +102,7 @@ export default {
             ].filter(Boolean)
           };
         }
+        return {};
       });
 
       try {

src/runtime/components/BoosterPicture/Base.vue

@@ -97,6 +97,7 @@ export default {
           style: [getPictureStyleDescription(metaSources.value, classNames)]
         };
       }
+      return {};
     });
     try {
       metaSources.value = await sourceList.getMeta($img, $booster);