Gentlemen, choose your weapons.

http://en.wikipedia.org/wiki/Indent_style

I pick: Allman style.

Downside: Proprietary AIDS -
>This style is used by default in Microsoft Visual Studio 2005 and Apple's Xcode.

>>14 is a faggot
    for(listhead_t *cur = list->next; cur != list; cur = cur->next)
is only 67 chars wide. No need breaking the line.
Also, the second for is in bad taste and not ANSI-C. One should only program in ANSI-C (plus some assembly if needed) and/or Scheme.