Multisite: Fix `wp_get_sites()` to return an unlimited amount of sites when passing a falsy `limit` argument.

Props iandunn for the original patch.
Fixes #39879. See #35791.

Built from https://develop.svn.wordpress.org/trunk@40372


git-svn-id: http://core.svn.wordpress.org/trunk@40279 1a063a9b-81f0-0310-95a4-ce76da25c4cd

wp-includes/ms-deprecated.php

@@ -497,6 +497,9 @@ function wp_get_sites( $args = array() ) {
 	if( is_numeric( $args['limit'] ) ){
 		$args['number'] = $args['limit'];
 		$args['limit'] = null;
+	} elseif ( ! $args['limit'] ) {
+		$args['number'] = 0;
+		$args['limit'] = null;
 	}
 
 	// Make sure count is disabled.

wp-includes/version.php

@@ -4,7 +4,7 @@
  *
  * @global string $wp_version
  */
-$wp_version = '4.8-alpha-40371';
+$wp_version = '4.8-alpha-40372';
 
 /**
  * Holds the WordPress DB revision, increments when changes are made to the WordPress DB schema.