Initialize default values in declaration

youtrack-backup.pl

@@ -34,8 +34,8 @@ ()
 my $b2_app_key_id;	# Backblaze application key ID
 my $b2_app_key_secret;	# Backblaze application key secret
 my $b2_bucket;		# Backblaze B2 bucket name
-my $delay;		# seconds to delay between checking backup progress
-my $keep_count;		# number of backup files to keep
+my $delay = 30;		# seconds to delay between checking backup progress
+my $keep_count = 0;	# number of backup files to keep (0 = keep all)
 my $quiet;
 my $help;
 
@@ -80,9 +80,6 @@ ()
 my $content_header  = "--header \"Content-Type: application/json\"";
 my $progress_header = "--no-progress-meter";
 
-$delay      = 30 if (! defined($delay));
-$keep_count =  0 if (! defined($keep_count));
-
 my $curl_query1;
 my $curl_query2;
 my $curl_query;