make song choice configurable option

booking.regn_form.inc

@@ -911,13 +911,15 @@ function booking_form($node, &$form_state, $inserting = FALSE, $early_access_all
     '#default_value' => !empty($data->booking_random_facts) ? $data->booking_random_facts : ''
   );
 
-  $form['misc-areas']['booking_song_choice'] = array(
-    '#type' => 'textfield',
-    '#title' => t("Let us know if there's a song you'd love to sing during the week."),
-    '#maxlength' => 200,
-    '#required' => FALSE,
-    '#default_value' => !empty($data->booking_song_choice) ? $data->booking_song_choice : ''
-  );  
+  if (variable_get('booking_enable_songchoice', 0) == 1) {  
+    $form['misc-areas']['booking_song_choice'] = array(
+      '#type' => 'textfield',
+      '#title' => t("Let us know if there's a song you'd love to sing during the week."),
+      '#maxlength' => 200,
+      '#required' => FALSE,
+      '#default_value' => !empty($data->booking_song_choice) ? $data->booking_song_choice : ''
+    );
+  }
   
   if ($inserting == TRUE) {
     $form['submit'] = array(