Typos in metatag_metatags_cache_clear()

Problem

There are two typos in metatag_metatags_cache_clear() method which cause whole Metatag cache bin to clear when a change is made in a single entity.

Steps to Reproduce

Edit any node, change Metatags, save.

Expected Result

It should clear just the cache regarding the edited node.

Experienced Result

It clears the whole node cache from Metatag cache bin.

Proposed resolution

Change metatag.module line 587 from

if (empty($entity_id)) {

to

if (empty($entity_ids)) {

and change metatag.module line 591 from

if (!array($entity_ids)) {

to

if (!is_array($entity_ids)) {

Remaining tasks

The attached patch needs to be tested and included in the module.