修复通道列表音频开关

src/main/java/com/genersoft/iot/vmp/gb28181/bean/DeviceChannel.java

@@ -179,7 +179,7 @@ public class DeviceChannel extends CommonGBChannel {
 	private String  streamId;
 
 	@Schema(description = "是否含有音频")
-	private boolean ld;
+	private boolean hasAudio;
 
 	@Schema(description = "GPS的更新时间")
 	private String gpsTime;