OnUpdatingSign and OnUpdatedSign

[xoft]

Hmm, then the ToLua is generating wrong lua glue code. True, it cannot know that those 4 parameters are out-only.
Until we fix that, pass in 4 more empty strings:

Code:

local Line1, Line2, Line3, Line4 = World:GetSignLines(BlockX, BlockY, BlockZ, "", "", "", "");