[Minor] Add workaround for old perl

diff --git a/utils/rspamd_stats.pl b/utils/rspamd_stats.pl
index dcbce9cb2117beef828761528a295188a379d879..efb7873588e1f9f516b56850f4dd00d0bf563980 100755 (executable)
--- a/utils/rspamd_stats.pl
+++ b/utils/rspamd_stats.pl
@@ -5,6 +5,7 @@ use Data::Dumper;
 use Getopt::Long;
 use Pod::Usage;
 use Time::Local;
+use IO::Handle;
 use warnings;
 use strict;