mikel/mail — pull request #293 by kmeehl (2011-10-12 15:07:06+00:00)
Title: Fix NoMethodError on NilClass when the Content-type field is parsed as UnstructuredField

When Content-type header is parsed as UnstrucutredField, content_type may be truthy while has_content_type? returns false, resulting in content_type_parameters being nil

example:
Content-Type: ascii/text; \r\n