msvcrt: scanf fix a typo

[Juan Lang]

> Relevant code:
>    /* check %p with no hex digits */
>    ok( sscanf("1233", "%p", &ptr) == 1, "sscanf failed\n"  );
>    ok( ptr == (void *)0x1233,"sscanf reads %p instead of %x\n", ptr, 0x1233 );
>
>    ok( sscanf("1234", "%P", &ptr) == 1, "sscanf failed\n"  );
>    ok( ptr == (void *)0x1234,"sscanf reads %p instead of %x\n", ptr, 0x1234 );
>
>
> Comment reads %p. All the other chars are lower case, and you can see
> the values are different (1233 vs 1234).

That's not a compelling argument.  For all we know, the test was
intended to show that both %p and %P are interpreted the same way.
--Juan