lib/shadow.c: my_sgetspent(): Remove dead code

spwd.sp_flag is an unsigned long, which can never be negative.

Reviewed-by: "Serge E. Hallyn" <serge@hallyn.com>
Signed-off-by: Alejandro Colomar <alx@kernel.org>

lib/shadow.c

@@ -195,8 +195,6 @@ static struct spwd *my_sgetspent (const char *string)
 		spwd.sp_flag = SHADOW_SP_FLAG_UNSET;
 	else if (str2ul(&spwd.sp_flag, fields[8]) == -1)
 		return 0;
-	else if (spwd.sp_flag < 0)
-		return 0;
 
 	return (&spwd);
 }