simple patch for 0.28

[Derrick J Brashear]

This provides some additional types real AFS has:
*** include/stds.h~     Thu Sep  9 21:05:46 1999
--- include/stds.h      Wed Nov 24 22:05:47 1999
***************
*** 49,54 ****
--- 49,62 ----
  typedef u_int32_t u_int32;
  #endif
  
+ #ifndef HAVE_INT16
+ typedef int16_t int16;
+ #endif
+ 
+ #ifndef HAVE_U_INT16
+ typedef u_int16_t u_int16;
+ #endif
+ 
  /* for compat resons with other kerberos distributions */
  #if defined(KERBEROS) && !defined(HAVE_KRB_PRINCIPAL)
  typedef struct krb_principal{