Convert correct floor node to dirt as gourd grows

Before this patch, growing a gourd (e.g. melon, pumpkin) would always
convert a node west of the node below the stem to dirt if belonged to
the group “dirtifies_below_solid”. This happened because of a loop in
which the variables floorpos and floor were re-used without setting a
new value … therefore, both floorpos and floor were always containing
the last values set in a previous loop instead of the correct values.

This patch fixes the problem by setting both variables in both loops.

mods/ITEMS/mcl_farming/shared_functions.lua

@@ -388,12 +388,11 @@ function mcl_farming:add_gourd(full_unconnected_stem, connected_stem_basename, s
 					{ x=0, y=0, z=-1 },
 					{ x=0, y=0, z=1 },
 				}
-				local floorpos, floor
 				for n=#neighbors, 1, -1 do
 					local offset = neighbors[n]
 					local blockpos = vector.add(stempos, offset)
-					floorpos = { x=blockpos.x, y=blockpos.y-1, z=blockpos.z }
-					floor = minetest.get_node(floorpos)
+					local floorpos = { x=blockpos.x, y=blockpos.y-1, z=blockpos.z }
+					local floor = minetest.get_node(floorpos)
 					local block = minetest.get_node(blockpos)
 					local soilgroup = minetest.get_item_group(floor.name, "soil")
 					if not ((minetest.get_item_group(floor.name, "grass_block") == 1 or floor.name=="mcl_core:dirt" or soilgroup == 2 or soilgroup == 3) and block.name == "air") then
@@ -407,6 +406,8 @@ function mcl_farming:add_gourd(full_unconnected_stem, connected_stem_basename, s
 					local r = math.random(1, #neighbors)
 					local offset = neighbors[r]
 					local blockpos = vector.add(stempos, offset)
+					local floorpos = { x=blockpos.x, y=blockpos.y-1, z=blockpos.z }
+					local floor = minetest.get_node(floorpos)
 					local p2
 					if offset.x == 1 then
 						minetest.set_node(stempos, {name=connected_stem_names[1]})