Import: Avoid counting an uncountable type when reading arguments passed to a script.

Props josephscott.
Fixes #42898.
Built from https://develop.svn.wordpress.org/trunk@42771


git-svn-id: http://core.svn.wordpress.org/trunk@42601 1a063a9b-81f0-0310-95a4-ce76da25c4cd

wp-admin/includes/class-wp-importer.php

@@ -281,6 +281,9 @@ class WP_Importer {
  */
 function get_cli_args( $param, $required = false ) {
 	$args = $_SERVER['argv'];
+	if ( ! is_array( $args ) ) {
+		$args = array();
+	}
 
 	$out = array();
 

wp-includes/version.php

@@ -4,7 +4,7 @@
  *
  * @global string $wp_version
  */
-$wp_version = '5.0-alpha-42770';
+$wp_version = '5.0-alpha-42771';
 
 /**
  * Holds the WordPress DB revision, increments when changes are made to the WordPress DB schema.