Bail out of 4.3 term splitting routine when no shared terms are found.

Props dd32.
See #30261.
Built from https://develop.svn.wordpress.org/trunk@32819


git-svn-id: http://core.svn.wordpress.org/trunk@32790 1a063a9b-81f0-0310-95a4-ce76da25c4cd

wp-admin/includes/upgrade.php

@@ -1870,6 +1870,10 @@ function split_all_shared_terms() {
 		 HAVING term_tt_count > 1"
 	);
 
+	if ( empty( $shared_terms ) ) {
+		return;
+	}
+
 	// Rekey shared term array for faster lookups.
 	$_shared_terms = array();
 	foreach ( $shared_terms as $shared_term ) {

wp-includes/version.php

@@ -4,7 +4,7 @@
  *
  * @global string $wp_version
  */
-$wp_version = '4.3-alpha-32818';
+$wp_version = '4.3-alpha-32819';
 
 /**
  * Holds the WordPress DB revision, increments when changes are made to the WordPress DB schema.