[peterbotond]

the lmin[1] macro will convert the uints to a long int and then do the arithmetic.

[1]static __inline long lmin(long a, long b) { return (a < b ? a : b); }

[2]static __inline u_int min(u_int a, u_int b) { return (a < b ? a : b); }

Edit: 6.3.1.8 Usualarithmetic conversions in the c-99 standard.