The entire point of the Dragon being male is that at the end of the last cycle the dark one used his last bit of power to corrupt the male half of the power so that all the men who channel it go mad and die. Since the dragon is always male this all but ensured the dark one's victory this time around. That was the whole purpose of the corruption.
But given we know Rand is the Dragon Reborn, and male, it ultimately doesn't matter that much. It just means the Dark One was banking on the Dragon Reborn reincarnating as male (or assumed they were always male incorrectly and just got lucky this time) so it doesn't really change anything.
Yes, it's a silly thing to add and they probably shouldn't have, but it doesn't actually detract in the end. ---