message: Fixed hide the speaker when no media
diff: <div class="phsym" v-if="phsym">
  <div class="phsym-item" v-for="p in phsym">
  {{ `${p.lang}: ${p.al}` }}
  - <speaker :src="p.pron"></speaker>
  + <speaker v-if="p.pron" :src="p.pron"></speaker>
  </div>
  </div> <!--phsym-->
  