[update] : No output when the channel list is empty

diff --git a/tools/channel.sh b/tools/channel.sh
index 48c887c..b236c4a 100755 (executable)
--- a/tools/channel.sh
+++ b/tools/channel.sh
@@ -93,7 +93,9 @@ check() {
 
 show() {
     gen_channel_list
-    echo "${channellist[*]}"
+    if (( "${#channellist[*]}" > 0)); then
+        echo "${channellist[*]}"
+    fi
 }