activity_bar.pl: Prevent adding the hook more than once

The `enable` subcommand should be a no-op if the hook is already
enabled.

1 files changed, 2 insertions, 1 deletions

diff --git a/activity_bar.pl b/activity_bar.pl
index 88a99e1..8f576c3 100644
--- a/activity_bar.pl
+++ b/activity_bar.pl
@@ -75,8 +75,9 @@ sub activity_bar_command_cb {
 	if ($args eq 'disable') {
 		anybar_send('hollow');
 		weechat::unhook($print_hook);
+		$print_hook = undef;
 	}
-	if ($args eq 'enable') {
+	if ($args eq 'enable' && !$print_hook) {
 		$print_hook = weechat::hook_print('', '', '', 0, 'print_cb', '');
 	}