兼容没有fontsize

src/components/Adult/preview/DialogueArticleViewChs/AnswerModel.vue

@@ -726,7 +726,7 @@ export default {
     },
     hengStyle() {
       return function (config) {
-        let sizeVal = config ? config.fontSize.replace("px", "") : 20;
+        let sizeVal = config && config.fontSize ? config.fontSize.replace("px", "") : 20;
         return {
           minHeight: Number(sizeVal) + 9 + "px",
           lineHeight: Number(sizeVal) + 8 + "px",