Correct call to handle exceptions when reprocessing to add to ActiveR…

…ecord#errors

lib/paperclip/attachment.rb

@@ -221,7 +221,7 @@ def reprocess!
       end
     rescue Exception => msg
       # in the case of an exception, just add to activerecord base errors, and return so we can skip to the next one
-      add_to_base msg
+      @instance.errors.add_to_base msg
       return true
     end