Fix: syncronize connections for new translation

[jhotadhari]

Fix error undefined variable fromConnection in /wp-content/plugins/p2p-wpml/synchonizer.php on line 194.

Reproduce the error:

1. Create two custom post types and register a p2p connection.
2. Add new post (post_type_a) and set some connections to posts (post_type_b).
3. Add a translation to that post (post_type_a).

• The error happens here.
• The translated post (post_type_a) doesn't have any translated posts (post_type_b) connected.

After the fix the synchronization works. Tested in gutenberg.
WordPress 5.2.2
wpml 4.2.7.1
p2p--wpml 1.2.5