support for format 0 and 1 maps

src/mapblock.cpp

@@ -1936,6 +1936,12 @@ void MapBlock::deSerialize(std::istream &is, u8 version)
 	if(!ser_ver_supported(version))
 		throw VersionMismatchException("ERROR: MapBlock format not supported");
 
+	// These have no lighting info
+	if(version <= 1)
+	{
+		setLightingExpired(true);
+	}
+
 	// These have no compression
 	if(version <= 3 || version == 5 || version == 6)
 	{

src/serialization.h

@@ -54,7 +54,7 @@ with this program; if not, write to the Free Software Foundation, Inc.,
 // Highest supported serialization version
 #define SER_FMT_VER_HIGHEST 15
 // Lowest supported serialization version
-#define SER_FMT_VER_LOWEST 2
+#define SER_FMT_VER_LOWEST 0
 
 #define ser_ver_supported(v) (v >= SER_FMT_VER_LOWEST && v <= SER_FMT_VER_HIGHEST)