Fix a crash (assert) when client set serial version < 24 in INIT

When SER_FMT_VER_LOWEST is set to zero, then the test is stupid in INIT because all client works. In mapblock we check if client's serialization version is < 24, but if client sent serialization version < 24 (15 for example) the server set it and tried to send nodes, then BOOM

To resolve the problem:
* Create a different CLIENT_MIN_VERSION to handle this problem
* Remove the exception
* Use an assert in case of bad developer code

1 files changed, 1 insertions, 5 deletions

diff --git a/src/mapblock.cpp b/src/mapblock.cpp
index 4cc0abc81..ecd9a016b 100644
--- a/src/mapblock.cpp
+++ b/src/mapblock.cpp
@@ -526,11 +526,7 @@ void MapBlock::serialize(std::ostream &os, u8 version, bool disk)
 		throw SerializationError("ERROR: Not writing dummy block.");
 	}
 
-	// Can't do this anymore; we have 16-bit dynamically allocated node IDs
-	// in memory; conversion just won't work in this direction.
-	if(version < 24)
-		throw SerializationError("MapBlock::serialize: serialization to "
-				"version < 24 not possible");
+	assert(version >= SER_FMT_CLIENT_VER_LOWEST);
 
 	// First byte
 	u8 flags = 0;