Various Notice fixes (#1237)

* Use the right post ID field

Fixes a Notice of `Undefined index: post_ID`.

This likely previously worked, as `get_post( null )` quite possibly was returning the correct object.

* Fix a variable typo

Fixes a PHP Notice of `Undefined variable: statuses`.

public_html/wp-content/plugins/wcpt/wcpt-events/class-events-application.php

@@ -150,7 +150,7 @@ public function get_default_application_values() {
 	public function create_post( $data ) {
 		// Create the post.
 		$wordcamp_user_id = get_user_by( 'email', 'support@wordcamp.org' )->ID;
-		$statues = \WordCamp_Loader::get_post_statuses();
+		$statuses = \WordCamp_Loader::get_post_statuses();
 
 		$post = array(
 			'post_type'   => self::get_event_type(),

public_html/wp-content/plugins/wcpt/wcpt-wordcamp/wordcamp-admin.php

@@ -817,7 +817,7 @@ public function enforce_post_status( $post_data, $post_data_raw ) {
 				return $post_data;
 			}
 
-			$post = get_post( $post_data_raw['post_ID'] );
+			$post = get_post( $post_data_raw['ID'] );
 			if ( ! $post ) {
 				return $post_data;
 			}