From 85353e0ce683ebcfd7d19910ae7b70c7396153ac Mon Sep 17 00:00:00 2001
From: Duane Robertson <duane@duanerobertson.com>
Date: Sun, 29 May 2016 19:29:48 -0500
Subject: [PATCH] Prevent crash in mapgens with no biomemap.

---
 mapgen.lua | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/mapgen.lua b/mapgen.lua
index b049384..34ddf60 100644
--- a/mapgen.lua
+++ b/mapgen.lua
@@ -584,7 +584,10 @@ local function generate(p_minp, p_maxp, seed)
 						end
 					else
 						local pn = plant_n[index]
-						local biome = biome_ids[biomemap[index]]
+						local biome
+						if biomemap then
+							biome = biome_ids[biomemap[index]]
+						end
 						-----------------------------------------------------------
 						-- water decoration non-loop -- only there to enable breaks
 						-- Remove this loop to eliminate water decorations.