* src/mapihelp.cpp
(get_first_attach_data_with_mime_tag_and_file_name): Rename to ...
(get_first_attach_data_tag_fname): to keep symbol length at bay.
(get_first_attach_data_tag_fname): Protect strcmp against a NULL
return value from get_attach_filename.  Use
get_content_type_from_header instead of accidently commited
get_message_content_type.  Minor reformatting.