- Patch #1001624 by pillarsdotnet: avoid 'Undefined index' notice in...

- Patch #1001624 by pillarsdotnet: avoid 'Undefined index' notice in field_info_max_weight() function of modules/field/field.info.inc.

modules/field/field.info.inc

@@ -793,7 +793,7 @@ function field_info_max_weight($entity_type, $bundle, $context) {
     if ($context == 'form') {
       $weights[] = $instance['widget']['weight'];
     }
-    else {
+    elseif (isset($instance['display'][$context]['weight'])) {
       $weights[] = $instance['display'][$context]['weight'];
     }
   }