修复分页逻辑

src/pager/index.js

@@ -94,7 +94,7 @@ class Pager extends Component {
       default: 0,
       attribute: false,
       observer(v) {
-        this.totalpage = Math.ceil(v / this.pagesize)
+        this.totalpage = Math.ceil(v / this.pagesize) || 1
       }
     },
     totalpage: {
@@ -102,6 +102,9 @@ class Pager extends Component {
       default: 1,
       attribute: false,
       observer(v) {
+        if (v < 1) {
+          v = 1
+        }
         if (this.page > v) {
           this.page = v
         }