Fixed bug in database cross reference field

tripal_chado/includes/TripalFields/chado_linker__prop/chado_linker__prop_widget.inc

@@ -49,7 +49,8 @@ class chado_linker__prop_widget extends ChadoFieldWidget {
     }
 
     // Check $form_state['values'] to see if an AJAX call set the values.
-    if (array_key_exists('values', $form_state) and array_key_exists($delta, $form_state['values'])) {
+    if (array_key_exists('values', $form_state) and
+        array_key_exists($delta, $form_state['values'])) {
       $record_id = $form_state['values'][$field_name]['und'][$delta]['chado-' . $field_table . '__' . $pkey];
       $fk_value = $form_state['values'][$field_name]['und'][$delta]['chado-' . $field_table . '__' . $lfkey_field];
       $type_id = $form_state['values'][$field_name]['und'][$delta]['chado-' . $field_table . '__type_id'];

tripal_chado/includes/TripalFields/sbo__database_cross_reference/sbo__database_cross_reference_widget.inc

@@ -43,7 +43,8 @@ class sbo__database_cross_reference_widget extends ChadoFieldWidget {
     }
 
     // Check $form_state['values'] to see if an AJAX call set the values.
-    if (array_key_exists('values', $form_state)) {
+    if (array_key_exists('values', $form_state) and
+        array_key_exists($delta, $form_state['values'])) {
       $record_id = $form_state['values'][$field_name]['und'][$delta]['chado-' . $field_table . '__' . $pkey];
       $fkey_value = $form_state['values'][$field_name]['und'][$delta]['chado-' . $field_table . '__' . $fkey];
       $dbxref_id = $form_state['values'][$field_name]['und'][$delta]['chado-' . $field_table . '__dbxref_id'];