fix: sqlite null ref (nodejs#4016)

Author: ronag

lib/cache/sqlite-cache-store.js

@@ -61,7 +61,7 @@ module.exports = class SqliteCacheStore {
   #countEntriesQuery
 
   /**
-   * @type {import('node:sqlite').StatementSync}
+   * @type {import('node:sqlite').StatementSync | null}
    */
   #deleteOldValuesQuery
 
@@ -344,14 +344,14 @@ module.exports = class SqliteCacheStore {
 
     {
       const removed = this.#deleteExpiredValuesQuery.run(Date.now()).changes
-      if (removed > 0) {
+      if (removed) {
         return removed
       }
     }
 
     {
-      const removed = this.#deleteOldValuesQuery.run(Math.max(Math.floor(this.#maxCount * 0.1), 1)).changes
-      if (removed > 0) {
+      const removed = this.#deleteOldValuesQuery?.run(Math.max(Math.floor(this.#maxCount * 0.1), 1)).changes
+      if (removed) {
         return removed
       }
     }