allow admin to sign up more angels than needed again

includes/pages/user_shifts.php

@@ -251,7 +251,6 @@ function user_shifts() {
         WHERE `start` < '" . sql_escape($shift['end']) . "' AND `end` > '" . sql_escape($shift['start']) . "'") > 0) {
       error(_("You already subscribed to shift in the same timeslot. Please contact a dispatcher to join the shift."));
       redirect(shift_link($shift));
-    }
       
       $needed_angeltypes = NeededAngelTypes_by_shift($shift['SID']);
       if ($needed_angeltypes === false)
@@ -264,6 +263,7 @@ function user_shifts() {
             error(_("The shift is already full."));
             redirect(shift_link($shift));
           }
+    }
     
     if (in_array('user_shifts_admin', $privileges))
       $type = sql_select("SELECT * FROM `AngelTypes` WHERE `id`=" . sql_escape($type_id) . " LIMIT 1");