Issue #3161155: Fix warning when validating a new sandbox project

release/project_release.module

@@ -704,7 +704,7 @@ function project_release_node_validate(&$node, $form, &$form_state) {
     if (!variable_get('project_release_sandbox_allow_release', TRUE) && $node->field_project_type[LANGUAGE_NONE][0]['value'] === 'sandbox') {
       if (!empty($form_state['values']['field_project_has_releases'][LANGUAGE_NONE][0]['value'])) {
         unset($form_state['input']['field_project_has_releases']);
-        form_set_value($form['field_project_has_releases'][LANGUAGE_NONE], FALSE, $form_state);
+        form_set_value($form['field_project_has_releases'][LANGUAGE_NONE], [FALSE], $form_state);
       }
     }
   }