From f706644a50b9bc62de39f571b044c7f7c55078e4 Mon Sep 17 00:00:00 2001
From: Perttu Ahola <celeron55@gmail.com>
Date: Fri, 22 Jul 2011 18:51:49 +0300
Subject: [PATCH] Fixed the problem of <=r548 clients fucking up maps on >=r549
 servers. Also, already fucked up maps are now loaded correctly.

---
 src/mapnode.cpp | 38 +++++++++++++++++++++++---------------
 1 file changed, 23 insertions(+), 15 deletions(-)

diff --git a/src/mapnode.cpp b/src/mapnode.cpp
index b9dfd35b0..1e9b64989 100644
--- a/src/mapnode.cpp
+++ b/src/mapnode.cpp
@@ -267,10 +267,10 @@ void MapNode::serialize(u8 *dest, u8 version)
 	{
 		// In these versions, CONTENT_IGNORE and CONTENT_AIR
 		// are 255 and 254
-		if(d == CONTENT_IGNORE)
-			d = 255;
-		else if(d == CONTENT_AIR)
-			d = 254;
+		if(actual_d == CONTENT_IGNORE)
+			actual_d = 255;
+		else if(actual_d == CONTENT_AIR)
+			actual_d = 254;
 	}
 
 	if(version == 0)
@@ -317,17 +317,25 @@ void MapNode::deSerialize(u8 *source, u8 version)
 		d = source[0];
 		param = source[1];
 		param2 = source[2];
-		
-		// Convert from old version to new
-		if(version <= 18)
-		{
-			// In these versions, CONTENT_IGNORE and CONTENT_AIR
-			// are 255 and 254
-			if(d == 255)
-				d = CONTENT_IGNORE;
-			else if(d == 254)
-				d = CONTENT_AIR;
-		}
+	}
+	
+	// Convert from old version to new
+	if(version <= 18)
+	{
+		// In these versions, CONTENT_IGNORE and CONTENT_AIR
+		// are 255 and 254
+		if(d == 255)
+			d = CONTENT_IGNORE;
+		else if(d == 254)
+			d = CONTENT_AIR;
+	}
+	// version 19 is fucked up with sometimes the old values and sometimes not
+	if(version == 19)
+	{
+		if(d == 255)
+			d = CONTENT_IGNORE;
+		else if(d == 254)
+			d = CONTENT_AIR;
 	}
 }