[Minor] Fix perlcritic warning in fuzzy_redis_migrate.pl

Replace 'return undef' with 'return' to comply with PBP guidelines.

diff --git a/utils/fuzzy_redis_migrate.pl b/utils/fuzzy_redis_migrate.pl
index 81804180a1a7a11259647daa8c9dcc9b6e7c52d4..480745ef66451a016db13be914d57e603c144e19 100755 (executable)
--- a/utils/fuzzy_redis_migrate.pl
+++ b/utils/fuzzy_redis_migrate.pl
@@ -545,7 +545,7 @@ sub connect_redis {
         ($opt{source_password} || $opt{password}) :
         ($opt{dest_password} || $opt{password});
 
-    return undef unless $host;
+    return unless $host;
 
     my %conn_opts = (
         server => "$host:$port",