Fix issue where the generation api always returns single image

fooocusapi/worker.py

@@ -701,6 +701,8 @@ def callback(step, x0, x, total_steps, y):
                         log(x, d, single_line_number=3)
 
                 # Fooocus async_worker.py code end
+
+                results += imgs
             except model_management.InterruptProcessingException as e:
                 print("User stopped")
                 results.append(ImageGenerationResult(
@@ -720,7 +722,7 @@ def callback(step, x0, x, total_steps, y):
         if queue_task.finish_with_error:
             task_queue.finish_task(queue_task.seq)
             return queue_task.task_result
-        return yield_result(imgs, tasks)
+        return yield_result(results, tasks)
     except Exception as e:
         print('Worker error:', e)
         if not queue_task.is_finished: