From fa0eaad4f90c29a582c66ca317e83892dbd14da5 Mon Sep 17 00:00:00 2001
From: gb <741021719@qq.com>
Date: Fri, 25 Nov 2022 14:36:19 +0800
Subject: [PATCH] =?UTF-8?q?=E4=BF=AE=E5=A4=8DBUG?=
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---
 sane/scanned_img.h | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/sane/scanned_img.h b/sane/scanned_img.h
index 3df550e..6f93bfe 100644
--- a/sane/scanned_img.h
+++ b/sane/scanned_img.h
@@ -114,6 +114,7 @@ class safe_queue
 	std::mutex			lock_;
 	std::vector<TNS>	queue_;
 	size_t				bytes_;
+	T					empty_;
 
 public:
 	safe_queue() : bytes_(0)
@@ -157,6 +158,8 @@ public:
 			if (first)
 				first(t.t);
 		}
+		else
+			t.t = empty_;
 
 		return t.t;
 	}