[PATCH] ui-refs.c: Simplify and inline cmp_age()

[Jason A. Donenfeld]

zx2c4 at thinkpad ~ $ cat a.c
static int cmp_age(int age1, int age2)
{
       if (age1 != 0 && age2 != 0)
               return age2 - age1;

       if (age1 == 0 && age2 == 0)
               return 0;

       if (age1 == 0)
               return +1;

       return -1;
}

static int cmp_age2(int age1, int age2)
{
        return age2 - age1;
}

void main()
{
        printf("%d %d\n", cmp_age(-1, 0), cmp_age2(-1, 0));
}
zx2c4 at thinkpad ~ $ gcc a.c
zx2c4 at thinkpad ~ $ ./a.out
-1 1