Fix buggy geology.wetten function

Function did not work because of renaming of mod (10 characters instead of 9 characters long)

init.lua

@@ -522,7 +522,7 @@ end
 function pedology.wetten(pos)
 	local node = minetest.get_node(pos)
 	local wet = minetest.get_item_group(node.name, "wet")
-	local cutbasename = string.sub(node.name,9,#node.name-2)
+	local cutbasename = string.sub(node.name,10,#node.name-2)
 	if pedology.maxwet[cutbasename] == nil then
 		return
 	elseif wet > pedology.maxwet[cutbasename] then