Fix render-issue if section it fully made of air

Author: TBlueF

BlueMapCore/src/main/java/de/bluecolored/bluemap/core/mca/ChunkAnvil118.java

@@ -66,14 +66,6 @@ public ChunkAnvil118(MCAWorld world, CompoundTag chunkTag) {
 
             for (CompoundTag sectionTag : sectionsTag) {
 
-                // skip empty sections
-                CompoundTag blockStatesTag = sectionTag.getCompoundTag("block_states");
-                if (blockStatesTag == null) continue;
-                ListTag<CompoundTag> paletteTag = (ListTag<CompoundTag>) blockStatesTag.getListTag("palette");
-                if (paletteTag == null) continue;
-                if (paletteTag.size() == 0) continue;
-                if (paletteTag.size() == 1 && BlockState.AIR.getFormatted().equals(paletteTag.get(0).getString("Name"))) continue;
-
                 Section section = new Section(sectionTag);
                 int y = section.getSectionY();
 

BlueMapCore/src/main/java/de/bluecolored/bluemap/core/mca/MCARegion.java

@@ -62,7 +62,7 @@ public MCAChunk loadChunk(int chunkX, int chunkZ, boolean ignoreMissingLightData
 
             int xzChunk = Math.floorMod(chunkZ, 32) * 32 + Math.floorMod(chunkX, 32);
 
-            raf.seek(xzChunk * 4);
+            raf.seek(xzChunk * 4L);
             int offset = raf.read() << 16;
             offset |= (raf.read() & 0xFF) << 8;
             offset |= raf.read() & 0xFF;
@@ -125,7 +125,7 @@ public Collection<Vector2i> listChunks(long modifiedSince) {
                 }
             }
         } catch (RuntimeException | IOException ex) {
-            Logger.global.logWarning("Failed to read .mca file: " + regionFile.getAbsolutePath() + " (" + ex.toString() + ")");
+            Logger.global.logWarning("Failed to read .mca file: " + regionFile.getAbsolutePath() + " (" + ex + ")");
         }
 
         return chunks;