Ensure slashing of paths returned by WP_Filesystem_Base::find_folder() is consistent with the slashing of paths; Affects Windows machines using the Direct transport.

git-svn-id: http://svn.automattic.com/wordpress/trunk@14810 1a063a9b-81f0-0310-95a4-ce76da25c4cd

wp-admin/includes/class-wp-filesystem-base.php

@@ -142,6 +142,7 @@ class WP_Filesystem_Base {
 				if ( defined($constant) && $folder === $dir )
 					return trailingslashit(constant($constant));
 		} elseif ( 'direct' == $this->method ) {
+			$folder = str_replace('\\', '/', $folder); //Windows path sanitiation
 			return trailingslashit($folder);
 		}