Problem with adding iCal views mode

Problem/Motivation

Some entities doesn't have 'Views mode' set correctly

Proposed resolution

Need to check if the entities has view mode set correctly first

Remaining tasks

Reviews need

User interface changes

N/A

API changes

See diff below

function date_ical_entity_info_alter(&$entity_info) {
  foreach ($entity_info as $entity_type => $info) {
+	if(!isset($entity_info[$entity_type]['view modes'])) {
+	  $entity_info[$entity_type]['view modes'] = array();
+	}
    $entity_info[$entity_type]['view modes'] += array(
      'ical' => array(
        'label' => t('iCal'),
        'custom settings' => TRUE,
      ),
    );
  }
}