gw-all-fields-template.php: Fixed a fatal error with the snippet and Nested Forms.

Author: saifsultanc

gravity-forms/gw-all-fields-template.php

@@ -177,6 +177,7 @@ public function all_fields_extra_options( $value, $merge_tag, $modifiers, $field
 			 */
 			if ( $context == 'nested' ) {
 
+				$input_ids = array();
 				$nested_form_field_id = rgar( $modifiers, 'parent', false );
 				if ( ! $nested_form_field_id ) {
 					break;
@@ -200,7 +201,7 @@ public function all_fields_extra_options( $value, $merge_tag, $modifiers, $field
 				case 'filter':
 					if ( in_array( $field->id, $field_ids ) ) {
 						// Check for input-specific filters.
-						if ( is_array( $raw_value ) && ! in_array( $field->id, $input_ids ) ) {
+						if ( is_array( $raw_value ) && ! empty( $input_ids ) && ! in_array( $field->id, $input_ids ) ) {
 							$filtered_values = array();
 
 							foreach ( $input_ids as $input_id ) {