fix km4ack#450

Author: km4ack

app-check

@@ -709,10 +709,12 @@ REPEAT_CURRENT_VER=$(dpkg --list | grep repeater-start | awk '{print $3}')
 REPEAT_LATEST=$(curl -s https://sourceforge.net/projects/repeater-start/files/ | grep all.deb | head -1 | sed 's/.*repeater/repeater/;s/".*//')
 REPEAT_LATEST_VER=$(echo $REPEAT_LATEST | sed 's/repeater-start_//;s/_.*//')
 
-		if (($(echo "${REPEAT_LATEST_VER} ${REPEAT_CURRENT_VER}" | awk '{print ($1 > $2)}'))); then
+		if [ -z "$REPEAT_CURRENT_VER" ]; then
+			echo "REPEAT=Not_Installed" >> $UPDATEFILE
+		elif (($(echo "${REPEAT_LATEST_VER} ${REPEAT_CURRENT_VER}" | awk '{print ($1 > $2)}'))); then
 			echo "REPEAT=NEEDS-UPDATE" >> $UPDATEFILE
 		else
 			echo "REPEAT=is_latest_version" >> $UPDATEFILE
 		fi
 
-CHECK
+CHECK