fix(scroll): nested scroll bug

when inner element can't scroll

Author: fengweiyao

src/components/scroll/scroll.vue

@@ -386,12 +386,18 @@
         const reachBoundaryX = distX > 0 ? pos.x >= this.scroll.minScrollX : distX < 0 ? pos.x <= this.scroll.maxScrollX : false
         const reachBoundaryY = distY > 0 ? pos.y >= this.scroll.minScrollY : distY < 0 ? pos.y <= this.scroll.maxScrollY : false
         const freeScroll = this.scroll.freeScroll
+        const hasHorizontalScroll = this.scroll.hasHorizontalScroll
+        const hasVerticalScroll = this.scroll.hasVerticalScroll
+
+        if (!hasHorizontalScroll && !hasVerticalScroll) {
+          return true
+        }
 
-        let reachBoundary
         if (freeScroll) {
           return reachBoundaryX || reachBoundaryY
         }
 
+        let reachBoundary
         if (this.scroll.movingDirectionX) {
           reachBoundary = reachBoundaryX
         } else if (this.scroll.movingDirectionY) {