fix in case data is missing

home.admin/config.scripts/blitz.statusscan.sh

@@ -92,6 +92,7 @@ if [ ${lndRunning} -eq 1 ]; then
     # lnd scan progress
     scanTimestamp=$(echo ${lndinfo} | jq -r '.best_header_timestamp')
     echo "scanTimestamp=${scanTimestamp}"
+    if [ ${#scanTimestamp} -gt 0 ]; then
       scanDate=$(date -d @${scanTimestamp})
       echo "scanDate='${scanDate}'"
 
@@ -102,6 +103,7 @@ if [ ${lndRunning} -eq 1 ]; then
       scannedSeconds=$(echo "${scanTimestamp}-${genesisTimestamp}" | bc)
       scanProgress=$(echo "scale=2; $scannedSeconds*100/$totalSeconds" | bc)
       echo "scanProgress=${scanProgress}"
+    fi
     
   fi