suppress grep output

offload-one

@@ -36,7 +36,7 @@ function mayicontinue {
 
 mayicontinue
 
-if test -z "${OFFLOAD_TARGET}" && ! cat ./offload_targets 2> /dev/null | grep -E '^rsync://[^/]+/[^/]+'; then
+if test -z "${OFFLOAD_TARGET}" && ! cat ./offload_targets 2> /dev/null | grep -qE '^rsync://[^/]+/[^/]+'; then
   echo "No valid offload target specified in OFFLOAD_TARGET environment variable or ./offload_targets file, aborting offload"
   sleep 30
   exit 1