Fixing mpv length option for webradio check

checks/webradio.sh

@@ -112,8 +112,9 @@ check_audiostream_mpv() {
 	then
 		logdate INFO "$tc_name: Running mpv on '$1' for ${time}s" 3
 	fi
+	run_time=$(expr $time + 2)
 	start_time=$(date "+%s")
-	$MPV --vo=null --ao=null --o=/dev/null --of=wav --length $time "$1" 1> /dev/null 2>/dev/null
+	$MPV --vo=null --ao=null --o=/dev/null --of=wav --end=$run_time "$1" 1> /dev/null 2>/dev/null
 	res=$?
 	stop_time=$(date "+%s")
 	run_time=$(( stop_time - start_time))