Fix EmergeManager::getBlockSeed()

[ShadowNinja]

No description provided.

[doserj]

What's the difference to get_blockseed() in mapgen_v6.cpp? should they do the same thing? should only one of them be defined?

I agree that currently the function is broken. But your fix still makes it behave differently to get_blockseed() in mapgen_v6.cpp

[ShadowNinja]

I made the functions similar and I am not sure what the difference is, you should ask @kwolekr.

[kwolekr]

Thanks for pointing this out, but I have it fixed in my new_emerge branch along with a bunch of other miscellaneous fixes.
With this changed, papyrus and ore will be back in their exact positions as they were in 0.4.3.. it shouldn't cause a worrying amount of inconsistency in maps.