src: add CHECK_NOT_NULL for eq_wrap_async

Author: Felix The Cat

src/node_file.cc

@@ -1992,25 +1992,24 @@ static void ReadDir(const FunctionCallbackInfo<Value>& args) {
 
   if (argc > 3) {  // readdir(path, encoding, withTypes, req)
     FSReqBase* req_wrap_async = GetReqWrap(args, 3);
-    if (req_wrap_async != nullptr) {
-      ASYNC_THROW_IF_INSUFFICIENT_PERMISSIONS(
-          env,
-          req_wrap_async,
-          permission::PermissionScope::kFileSystemRead,
-          path.ToStringView());
-      req_wrap_async->set_with_file_types(with_types);
-      FS_ASYNC_TRACE_BEGIN1(
-          UV_FS_SCANDIR, req_wrap_async, "path", TRACE_STR_COPY(*path))
-      AsyncCall(env,
-                req_wrap_async,
-                args,
-                "scandir",
-                encoding,
-                AfterScanDir,
-                uv_fs_scandir,
-                *path,
-                0 /*flags*/);
-    }
+    CHECK_NOT_NULL(req_wrap_async);
+    ASYNC_THROW_IF_INSUFFICIENT_PERMISSIONS(
+        env,
+        req_wrap_async,
+        permission::PermissionScope::kFileSystemRead,
+        path.ToStringView());
+    req_wrap_async->set_with_file_types(with_types);
+    FS_ASYNC_TRACE_BEGIN1(
+        UV_FS_SCANDIR, req_wrap_async, "path", TRACE_STR_COPY(*path))
+    AsyncCall(env,
+              req_wrap_async,
+              args,
+              "scandir",
+              encoding,
+              AfterScanDir,
+              uv_fs_scandir,
+              *path,
+              0 /*flags*/);
   } else {  // readdir(path, encoding, withTypes)
     THROW_IF_INSUFFICIENT_PERMISSIONS(
         env, permission::PermissionScope::kFileSystemRead, path.ToStringView());