show dummy icon for radios without logo. fix #13

src/components/dialogs/Radios.vue

@@ -53,7 +53,7 @@
             <td>
               <img
                 class="radioCover"
-                :src="radio.cover32"
+                :src="cover(radio)"
                 @click="updateCover(radio)"
               />
             </td>
@@ -116,6 +116,13 @@ export default {
     updateCover(radio) {
       this.$store.dispatch("radios/updateRadio", radio);
     },
+    cover(radio) {
+      let res = "/static/icons/dummy/radio.svg";
+      if (radio.cover32) {
+        res = radio.cover32;
+      }
+      return res;
+    },
   },
 };
 </script>