asn1_set_seq_out: fixed indentation
mime_hdr_new: Initialise tmpname with NULL

Also remove initialisation further on in the code
mime_hdr_new: removed superfluous initialisation of tmpval
mime_hdr_new: extra return -> goto err

Spotted by Kurt Roeckx
mime_hdr_addparam: Initialise tmpname with NULL

Also remove initialisation further on in the code
mime_hdr_addparam: removed superfluous initialisation of tmpval
mime_hdr_addparam: moved "err" label to start of line