Fixed the ENOENT test and a dumb typo.

lib/paperclip/geometry.rb

@@ -18,7 +18,7 @@ module Paperclip
     def self.from_file file
       file = file.path if file.respond_to? "path"
       parse(`#{Paperclip.path_for_command('identify')} "#{file}"`) ||
-        raise NotIdentifiedByImageMagickError, "#{file} is not recognized by the 'identify' command."
+        raise(NotIdentifiedByImageMagickError.new("#{file} is not recognized by the 'identify' command."))
     end
 
     # Parses a "WxH" formatted string, where W is the width and H is the height.

test/test_geometry.rb

@@ -82,7 +82,7 @@ class GeometryTest < Test::Unit::TestCase
 
     should "not generate from a bad file" do
       file = "/home/This File Does Not Exist.omg"
-      assert_raise(Errno::ENOENT){ @geo = Paperclip::Geometry.from_file(file) }
+      assert_raise(Paperclip::NotIdentifiedByImageMagick){ @geo = Paperclip::Geometry.from_file(file) }
     end
 
     [['vertical',   900,  1440, true,  false, false, 1440, 900, 0.625],