libinfinity 0.5.1: pam/pam_appl.h: No such file or directory

[ryandesign]

libinfinity 0.5.1 fails to compile on OS X 10.6:

infinoted-pam.c:30:26: error: pam/pam_appl.h: No such file or directory

infinoted/infinoted-pam.c contains this code:

#ifdef __APPLE__
#include <pam/pam_appl.h>
#else
#include <security/pam_appl.h>
#endif

The problem I believe is that OS X uses pam/pam_appl.h in version 10.5.x and earlier, and security/pam_appl.h in 10.6.x and higher.