load can't handle empty file

[Derick Eddington]

$ ls -l empty
-rw-r--r-- 1 d d 0 2008-08-09 17:35 empty
$ ikarus
Ikarus Scheme version 0.0.3+ (revision 1579, build 2008-08-09)
Copyright (c) 2006-2008 Abdulaziz Ghuloum

> (load "empty")
Unhandled exception
 Condition components:
   1. &assertion
   2. &who: open-string-input-port
   3. &message: "not a string"
   4. &irritants: (#!eof)
>

I discovered this after I made my ~/.ikarus-init.scm empty.

Also, there's a typo, "invali", in ikarus.load.ss line 97.

[Abdulaziz Ghuloum (aghuloum)]

Fixed in 1581.