mod_admin_extra: Fix stats(_host) argument types

src/mod_admin_extra.erl

@@ -532,12 +532,12 @@ commands() ->
      #ejabberd_commands{name = stats, tags = [stats],
 			desc = "Get statistical value: registeredusers onlineusers onlineusersnode uptimeseconds",
 			module = ?MODULE, function = stats,
-			args = [{name, string}],
+			args = [{name, binary}],
 			result = {stat, integer}},
      #ejabberd_commands{name = stats_host, tags = [stats],
 			desc = "Get statistical value for this host: registeredusers onlineusers",
 			module = ?MODULE, function = stats,
-			args = [{name, string}, {host, string}],
+			args = [{name, binary}, {host, binary}],
 			result = {stat, integer}}
     ].