Add a delimiter to _wp_filter_build_unique_id()'s handling of static method callbacks. props scribu, fixes #23265.

git-svn-id: http://core.svn.wordpress.org/trunk@24251 1a063a9b-81f0-0310-95a4-ce76da25c4cd

wp-includes/plugin.php

@@ -785,6 +785,6 @@ function _wp_filter_build_unique_id($tag, $function, $priority) {
 		}
 	} else if ( is_string($function[0]) ) {
 		// Static Calling
-		return $function[0].$function[1];
+		return $function[0] . '::' . $function[1];
 	}
 }