fix image size and crop and bg alignemnt options

test/models/image_test.rb

@@ -23,6 +23,11 @@ module Merged
     def test_aspect
       assert_equal first.aspect_ratio ,  [13,7]
     end
-
+    def test_init_no_change
+      image = first
+      size = image.size
+      image.init_file_size
+      assert_equal size , image.size
+    end
   end
 end