Fix asserts in flexible_unpacker.

include/ascs/ext/unpacker.h

@@ -233,7 +233,7 @@ public:
 	{
 		//length + msg
 		remain_len += bytes_transferred;
-		assert(remain_len <= std::max<size_t>(raw_buff.size(), big_msg.size()));
+		assert(remain_len <= (big_msg.empty() ? raw_buff.size() : big_msg.size()));
 
 		if (!big_msg.empty())
 		{
@@ -292,7 +292,7 @@ public:
 			return 0;
 
 		auto data_len = remain_len + bytes_transferred;
-		assert(data_len <= cur_msg_len);
+		assert(data_len <= (big_msg.empty() ? raw_buff.size() : big_msg.size()));
 
 		if ((size_t) -1 == cur_msg_len && data_len >= ASCS_HEAD_LEN) //the msg's head been received
 		{
@@ -313,7 +313,7 @@ public:
 	//if you introduce a ring buffer, then you will have the chance to provide a real scatter-gather buffer.
 	virtual typename super::buffer_type prepare_next_recv()
 	{
-		assert(remain_len < cur_msg_len);
+		assert(remain_len < (big_msg.empty() ? raw_buff.size() : big_msg.size()));
 		if (big_msg.empty())
 			return typename super::buffer_type(1, asio::buffer(raw_buff) + remain_len);
 
@@ -322,7 +322,7 @@ public:
 #elif ASIO_VERSION < 101100
 	virtual typename super::buffer_type prepare_next_recv()
 	{
-		assert(remain_len < cur_msg_len);
+		assert(remain_len < (big_msg.empty() ? raw_buff.size() : big_msg.size()));
 		if (big_msg.empty())
 			return asio::buffer(asio::buffer(raw_buff) + remain_len);
 
@@ -331,7 +331,7 @@ public:
 #else
 	virtual typename super::buffer_type prepare_next_recv()
 	{
-		assert(remain_len < cur_msg_len);
+		assert(remain_len < (big_msg.empty() ? raw_buff.size() : big_msg.size()));
 		if (big_msg.empty())
 			return asio::buffer(raw_buff) + remain_len;