Use Buffer not SharedBuffer in NetworkPacket::oldForgePacket

src/network/networkpacket.cpp

@@ -512,7 +512,7 @@ NetworkPacket& NetworkPacket::operator<<(video::SColor src)
 
 Buffer<u8> NetworkPacket::oldForgePacket()
 {
-	SharedBuffer<u8> sb(m_datasize + 2);
+	Buffer<u8> sb(m_datasize + 2);
 	writeU16(&sb[0], m_command);
 
 	u8* datas = getU8Ptr(0);