if (!a->force_charset) mutt_set_parameter ("charset", 0, &a->parameter);
if (!mutt_strcasecmp (mutt_get_body_charset (chsbuff, sizeof (chsbuff), a), "us-ascii")) a->noconv = 0;
void mutt_update_encoding (BODY *a){  CONTENT *info;  /* Previous value is usually wrong, apparently. */  if (!a->force_charset)    mutt_set_parameter ("charset", 0, &a->parameter);  if ((info = mutt_get_content_info (a->filename, a)) == NULL)    return;  mutt_set_encoding (a, info);  mutt_stamp_attachment(a);  safe_free ((void **) &a->content);  a->content = info;}