Issue #1312374 by KeyboardCowboy, Alan D.: Fatal error: Call to undefined...

Issue #1312374 by KeyboardCowboy, Alan D.: Fatal error: Call to undefined function link_field_property_info_callback() in field.info.inc on line 30

modules/field.info.inc

@@ -27,7 +27,12 @@ function entity_metadata_field_entity_property_info() {
 
           if ($instance && empty($instance['deleted'])) {
             foreach ($field_type['property_callbacks'] as $callback) {
-              $callback($info, $entity_type, $field, $instance, $field_type);
+              if (function_exists($callback)) {
+                $callback($info, $entity_type, $field, $instance, $field_type);
+              }
+              else {
+                watchdog($entity_type, 'Missing property callback %callback.', array('%callback' => $callback), WATCHDOG_ERROR);
+              }
             }
           }
         }