Internal: Optimize UserManager::get_extra_user_data() to avoid string concat when avoidable

main/inc/lib/usermanager.lib.php

@@ -3293,9 +3293,6 @@ class UserManager
                             FROM $t_ufv
                             WHERE field_id=".$row['id']." AND item_id = ".$user_id;
                     $resu = Database::query($sqlu);
-                    // get default value
-                    $sql_df = "SELECT default_value as fval_df FROM $t_uf
-                               WHERE id=".$row['id'];
 
                     if (Database::num_rows($resu) > 0) {
                         $rowu = Database::fetch_array($resu);
@@ -3304,6 +3301,9 @@ class UserManager
                             $fval = explode(';', $rowu['fval']);
                         }
                     } else {
+                        // get default value
+                        $sql_df = "SELECT default_value as fval_df FROM $t_uf
+                               WHERE id=".$row['id'];
                         $res_df = Database::query($sql_df);
                         $row_df = Database::fetch_array($res_df);
                         $fval = $row_df['fval_df'];