usermanager: Check host exists before trying to look up admins for it

diff --git a/core/usermanager.lua b/core/usermanager.lua
index 5e2e41fcd31c72a53afc2de9d6e6f901d38188ec..0152afd76cd1fba5077d197ee02f552b655ab25a 100644 (file)
--- a/core/usermanager.lua
+++ b/core/usermanager.lua
@@ -96,6 +96,8 @@ function get_provider(host)
 end
 
 function is_admin(jid, host)
+       if host and not hosts[host] then return false; end
+
        local is_admin;
        jid = jid_bare(jid);
        host = host or "*";