fix: v is undefined

Author: Akryum

src/components/RecycleScroller.vue

@@ -441,16 +441,17 @@ export default {
               view = this.addView(pool, i, item, key, type)
             }
           } else {
+            // Use existing view
+            // We don't care if they are already used
+            // because we are not in continous scrolling
+            v = unusedIndex.get(type) || 0
+
             if (!unusedPool || v >= unusedPool.length) {
               view = this.addView(pool, i, item, key, type)
               this.unuseView(view, true)
+              unusedPool = unusedViews.get(type)
             }
-            unusedPool = unusedViews.get(type)
 
-            // Use existing view
-            // We don't care if they are already used
-            // because we are not in continous scrolling
-            v = unusedIndex.get(type) || 0
             view = unusedPool[v]
             view.item = item
             view.nr.used = true