From c876179024c778af39baf35787f11c2c8d17c6af Mon Sep 17 00:00:00 2001
From: Megaf <mmegaf@gmail.com>
Date: Sun, 22 Jun 2014 20:42:26 -0300
Subject: [PATCH] api.lua:5: attempt to index local 'pos' (a nil value)

This was suggested by RBA to fix the follow.
```
18:43:28: ACTION[ServerThread]: Sofia punches object -27616: LuaEntitySAO at (13.9607,18.7545,-77.3249)
18:43:41: ERROR[main]: ERROR: An unhandled exception occurred: /home/minetest/Server/bin/../mods/areas/api.lua:5: attempt to index local 'pos' (a nil value)
18:43:41: ERROR[main]: stack traceback:
18:43:41: ERROR[main]:  /home/minetest/Server/bin/../mods/areas/api.lua:5: in function 'getAreasAtPos'
18:43:41: ERROR[main]:  /home/minetest/Server/bin/../mods/areas/legacy.lua:101: in function 'HasOwner'
18:43:41: ERROR[main]:  ...inetest/Server/bin/../mods/plantlife/plants_lib/init.lua:448: in function 'node_is_owned'
18:43:41: ERROR[main]:  ...etest/Server/bin/../mods/plantlife/flowers_plus/init.lua:97: in function <...etest/Server/bin/../mods/plantlife/flowers_plus/init.lua:74>

In thread b693a220:
/home/minetest/Server/src/main.cpp:1870: int main(int, char**): Assertion '0' failed.
Debug stacks:
DEBUG STACK FOR THREAD b20ff440:
#0  virtual void* CurlFetchThread::Thread()
DEBUG STACK FOR THREAD b693a220:
#0  int main(int, char**)
(Leftover data: #1  Dedicated server branch)
(Leftover data: #2  virtual void ServerMap::save(ModifiedState))
(Leftover data: #3  virtual void Database_SQLite3::saveBlock(MapBlock*))
(Leftover data: #4  void ItemStack::serialize(std::ostream&) const)
Aborted
```

I did not test that yet, will comment again here when tested.
---
 api.lua | 16 +++++++++-------
 1 file changed, 9 insertions(+), 7 deletions(-)

diff --git a/api.lua b/api.lua
index d6a2cfd..4458ba4 100644
--- a/api.lua
+++ b/api.lua
@@ -2,13 +2,15 @@
 -- Returns a list of areas that include the provided position
 function areas:getAreasAtPos(pos)
 	local a = {}
-	local px, py, pz = pos.x, pos.y, pos.z
-	for id, area in pairs(self.areas) do
-		local ap1, ap2 = area.pos1, area.pos2
-		if px >= ap1.x and px <= ap2.x and
-		   py >= ap1.y and py <= ap2.y and
-		   pz >= ap1.z and pz <= ap2.z then
-			a[id] = area
+	if pos then
+		local px, py, pz = pos.x, pos.y, pos.z
+		for id, area in pairs(self.areas) do
+			local ap1, ap2 = area.pos1, area.pos2
+			if px >= ap1.x and px <= ap2.x and
+					py >= ap1.y and py <= ap2.y and
+					pz >= ap1.z and pz <= ap2.z then
+				a[id] = area
+			end
 		end
 	end
 	return a