ctbcap: fix duplicate $EXT_FFMPEG_OPT generation

Author: KFERMercer

ctbcap

@@ -585,9 +585,8 @@ grab_stream() {
 
 watchdog() {
 	while true; do
-		unset STREAM_URL EXT_FFMPEG_OPT
 		utils timemark_exec 'init_path -f "${WATCHDOG_LOGFILE}:10000" "${FFMPEG_LOGFILE}:20000"'
-		fetch_m3u
+		unset STREAM_URL EXT_FFMPEG_OPT && fetch_m3u
 		# See the notes above fetch_m3u() .
 		case $? in
 		0)
@@ -605,7 +604,7 @@ watchdog() {
 					|| { grab_stream 2>&1 | tee -a "${FFMPEG_LOGFILE}" >/dev/null 2>&1; }
 				echo "[$(date "+%Y%m%d-%H%M%S")] Recording Interrupted..."
 				utils timemark_exec 'init_path -d "${SAVE_PATH}:${SAVE_PATH_SPACE}" "${LOG_PATH}:${LOG_PATH_SPACE}"' || break
-				fetch_m3u >/dev/null 2>&1
+				unset STREAM_URL EXT_FFMPEG_OPT && fetch_m3u >/dev/null 2>&1
 				case $? in
 				0)
 					echo "[$(date "+%Y%m%d-%H%M%S")] Restart recording..."