Scripts: in `WP_Scripts::set_group()`, the `args` prop of the `_WP_Dependency` instance defaults to `null` - check that it is set before comparing.

Props tivnet, chriscct7.
Fixes #25462.

Built from https://develop.svn.wordpress.org/trunk@34862


git-svn-id: http://core.svn.wordpress.org/trunk@34827 1a063a9b-81f0-0310-95a4-ce76da25c4cd

wp-includes/class.wp-scripts.php

@@ -247,7 +247,7 @@ class WP_Scripts extends WP_Dependencies {
 	 * @return bool Not already in the group or a lower group
 	 */
 	public function set_group( $handle, $recursion, $group = false ) {
-		if ( $this->registered[$handle]->args === 1 )
+		if ( isset( $this->registered[$handle]->args ) && $this->registered[$handle]->args === 1 )
 			$grp = 1;
 		else
 			$grp = (int) $this->get_data( $handle, 'group' );

wp-includes/version.php

@@ -4,7 +4,7 @@
  *
  * @global string $wp_version
  */
-$wp_version = '4.4-alpha-34861';
+$wp_version = '4.4-alpha-34862';
 
 /**
  * Holds the WordPress DB revision, increments when changes are made to the WordPress DB schema.