[update] 插入附录，找不到附录标题排序的就不算此附录排序

src/pages/page1/saicComponents/Appendix.vue

@@ -132,10 +132,12 @@
                 const text = element.GetTableDescription()
                 if (text == 'appendix') {
                   let number = element.GetCell(0, 0).GetContent().GetElement(1);
-                  const getNumbering = number.GetNumbering()
-                  if (getNumbering !== null) {
-                    oNumbering = getNumbering;
-                    ++Asc.scope.num
+                  if (number) {
+                    const getNumbering = number.GetNumbering()
+                    if (getNumbering !== null) {
+                      oNumbering = getNumbering;
+                      ++Asc.scope.num
+                    }
                   }
                 }
               }