fix issue when receiving partial lines

snmpd-oid-daemon.sh

@@ -463,15 +463,13 @@ function main() {
       # received complete line from stdin
       line=$buf
     elif (( rc > 128 )); then
-      # read timed out, check for partial data
-      if [ -n "$buf" ]; then
+      # read timed out, continue if no partial data received
+      [ -z "$buf" ] && continue
       echo "< $buf (partial line)" >&$DEBUGLOG
       line=$buf
       # read the rest of the line
       read -r -u $STDIN buf || exit 255
       line+=$buf
-      fi
-      continue
     else
       exit 255
     fi