From 19b65ce35725bfe3764755003be0032abe6aba4c Mon Sep 17 00:00:00 2001
From: bibo38 <bibo38@github.com>
Date: Sat, 5 Sep 2015 22:02:15 +0200
Subject: Fixed failed assertation

This was caused by a monster with a negative Y-axis.
Fixes #2336
---
 src/Mobs/Monster.cpp | 43 +++++++++++++++++++++++--------------------
 1 file changed, 23 insertions(+), 20 deletions(-)

diff --git a/src/Mobs/Monster.cpp b/src/Mobs/Monster.cpp
index 7bf56bb47..99909aa66 100644
--- a/src/Mobs/Monster.cpp
+++ b/src/Mobs/Monster.cpp
@@ -451,27 +451,30 @@ void cMonster::Tick(std::chrono::milliseconds a_Dt, cChunk & a_Chunk)
 		m_Target = nullptr;
 	}
 
-	// Process the undead burning in daylight.
-	HandleDaylightBurning(*Chunk, WouldBurnAt(GetPosition(), *Chunk));
-	if (TickPathFinding(*Chunk))
-	{
-		/* If I burn in daylight, and I won't burn where I'm standing, and I'll burn in my next position, and at least one of those is true:
-		1. I am idle
-		2. I was not hurt by a player recently.
-		Then STOP. */
-		if (
-			m_BurnsInDaylight && ((m_TicksSinceLastDamaged >= 100) || (m_EMState == IDLE)) &&
-			WouldBurnAt(m_NextWayPointPosition, *Chunk) &&
-			!WouldBurnAt(GetPosition(), *Chunk)
-		)
-		{
-			// If we burn in daylight, and we would burn at the next step, and we won't burn where we are right now, and we weren't provoked recently:
-			StopMovingToPosition();
-			m_GiveUpCounter = 40;  // This doesn't count as giving up, keep the giveup timer as is.
-		}
-		else
+	if (GetPosY() >= 0)
+	{
+		// Process the undead burning in daylight.
+		HandleDaylightBurning(*Chunk, WouldBurnAt(GetPosition(), *Chunk));
+		if (TickPathFinding(*Chunk))
 		{
-			MoveToWayPoint(*Chunk);
+			/* If I burn in daylight, and I won't burn where I'm standing, and I'll burn in my next position, and at least one of those is true:
+			1. I am idle
+			2. I was not hurt by a player recently.
+			Then STOP. */
+			if (
+				m_BurnsInDaylight && ((m_TicksSinceLastDamaged >= 100) || (m_EMState == IDLE)) &&
+				WouldBurnAt(m_NextWayPointPosition, *Chunk) &&
+				!WouldBurnAt(GetPosition(), *Chunk)
+			)
+			{
+				// If we burn in daylight, and we would burn at the next step, and we won't burn where we are right now, and we weren't provoked recently:
+				StopMovingToPosition();
+				m_GiveUpCounter = 40;  // This doesn't count as giving up, keep the giveup timer as is.
+			}
+			else
+			{
+				MoveToWayPoint(*Chunk);
+			}
 		}
 	}
 
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