From 29304a933b78a5a7af29687957230b1043164f7e Mon Sep 17 00:00:00 2001
From: Donald Ball <donald.ball@gmail.com>
Date: Fri, 21 Nov 2008 15:17:54 -0600
Subject: [PATCH] checking for nil filename

---
 lib/zoomifier.rb | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/lib/zoomifier.rb b/lib/zoomifier.rb
index d2c81fd..407ca9e 100644
--- a/lib/zoomifier.rb
+++ b/lib/zoomifier.rb
@@ -31,7 +31,7 @@ module Zoomifier
   # zoomified into a directory named 5. If there is already a directory with
   # this name, it will be destroyed without mercy.
   def self.zoomify(filename)
-    raise ArgumentError unless File.exists?(filename) && File.file?(filename)
+    raise ArgumentError unless filename && File.file?(filename)
     #filename = File.expand_path(filename)
     outputdir = File.dirname(filename) + '/' + File.basename(filename, '.*')
     raise ArgumentError unless filename != outputdir