Make sure not to render undefined

Author: carlobeltrame

pdf/src/campPrint/tableOfContents/TocEntryPageNumber.vue

@@ -1,13 +1,16 @@
 <template>
   <View class="toc-dotted-line" />
-  <Text :render="() => $toc[id]" class="toc-entry-page-number" />
+  <Text :render="() => $toc[id] ?? ''" class="toc-entry-page-number" />
 </template>
 <script>
 import PdfComponent from '@/PdfComponent.js'
 
 export default {
   name: 'TocEntryPageNumber',
   extends: PdfComponent,
+  props: {
+    id: { type: String, required: true },
+  },
 }
 </script>
 <pdf-style>