Don't validate chunk before it's been run through DataConverter (#7907)

patches/server/Asynchronous-chunk-IO-and-loading.patch

@@ -1487,12 +1487,6 @@ index 0000000000000000000000000000000000000000..00000000000000000000000000000000
 +            return;
 +        }
 +
-+        if (!ChunkMap.isChunkDataValid(chunkData.chunkData)) {
-+            LOGGER.error("Chunk file at {} is missing level data, skipping", new ChunkPos(this.chunkX, this.chunkZ));
-+            this.complete(ChunkLoadTask.createEmptyHolder());
-+            return;
-+        }
-+
 +        final ChunkPos chunkPos = new ChunkPos(this.chunkX, this.chunkZ);
 +
 +        final ChunkMap chunkManager = this.world.getChunkSource().chunkMap;
@@ -1511,6 +1505,12 @@ index 0000000000000000000000000000000000000000..00000000000000000000000000000000
 +                return;
 +            }
 +
++            if (!ChunkMap.isChunkDataValid(chunkData.chunkData)) {
++                LOGGER.error("Chunk file at {} is missing level data, skipping", new ChunkPos(this.chunkX, this.chunkZ));
++                this.complete(ChunkLoadTask.createEmptyHolder());
++                return;
++            }
++
 +            if (this.checkCancelled()) {
 +                return;
 +            }