Fix listing of directory contents for root device

Since revision 5010, issuing the ls command with a path not including the device name results in a NULL pointer dereference. This patch fixes the above by reverting one of the three hunks of the patch applied to create revision 5010.

Regards,
Francesco

2013-06-02 Francesco Lavra <[email protected]>

* grub-core/kern/corecmd.c (grub_core_cmd_ls): Fix handling of paths without a device name.

=== modified file 'grub-core/kern/corecmd.c'

@@ -134,7 +134,7 @@
 
       fs = grub_fs_probe (dev);
       path = grub_strchr (argv[0], ')');
-      if (! *path)
+      if (! path)
 	path = argv[0];
       else
 	path++;