Return 0 for light values if a dimenion does not have them

Fixes https://github.com/PaperMC/Starlight/issues/99

patches/server/0815-Rewrite-the-light-engine.patch

@@ -3067,10 +3067,10 @@ index 0000000000000000000000000000000000000000..1b0d92c68407cdb09ed8aac271b625d9
 +}
 diff --git a/src/main/java/ca/spottedleaf/starlight/common/light/StarLightInterface.java b/src/main/java/ca/spottedleaf/starlight/common/light/StarLightInterface.java
 new file mode 100644
-index 0000000000000000000000000000000000000000..7fe174f379ec8bb6a3e51251a5ed0e9ff64cf27b
+index 0000000000000000000000000000000000000000..ef8dcbb6bbc0769e9ccfdadb05e6a46c070eda98
 --- /dev/null
 +++ b/src/main/java/ca/spottedleaf/starlight/common/light/StarLightInterface.java
-@@ -0,0 +1,654 @@
+@@ -0,0 +1,665 @@
 +package ca.spottedleaf.starlight.common.light;
 +
 +import ca.spottedleaf.starlight.common.util.CoordinateUtils;
@@ -3127,6 +3127,9 @@ index 0000000000000000000000000000000000000000..7fe174f379ec8bb6a3e51251a5ed0e9f
 +
 +    public final LevelLightEngine lightEngine;
 +
++    private final boolean hasBlockLight;
++    private final boolean hasSkyLight;
++
 +    public StarLightInterface(final LightChunkGetter lightAccess, final boolean hasSkyLight, final boolean hasBlockLight, final LevelLightEngine lightEngine) {
 +        this.lightAccess = lightAccess;
 +        this.world = lightAccess == null ? null : (Level)lightAccess.getLevel();
@@ -3145,6 +3148,8 @@ index 0000000000000000000000000000000000000000..7fe174f379ec8bb6a3e51251a5ed0e9f
 +            this.maxLightSection = WorldUtil.getMaxLightSection(this.world);
 +        }
 +        this.lightEngine = lightEngine;
++        this.hasBlockLight = hasBlockLight;
++        this.hasSkyLight = hasSkyLight;
 +        this.skyReader = !hasSkyLight ? LayerLightEventListener.DummyLightLayerEventListener.INSTANCE : new LayerLightEventListener() {
 +            @Override
 +            public void checkBlock(final BlockPos blockPos) {
@@ -3253,6 +3258,9 @@ index 0000000000000000000000000000000000000000..7fe174f379ec8bb6a3e51251a5ed0e9f
 +    }
 +
 +    protected int getSkyLightValue(final BlockPos blockPos, final ChunkAccess chunk) {
++        if (!this.hasSkyLight) {
++            return 0;
++        }
 +        final int x = blockPos.getX();
 +        int y = blockPos.getY();
 +        final int z = blockPos.getZ();
@@ -3320,6 +3328,9 @@ index 0000000000000000000000000000000000000000..7fe174f379ec8bb6a3e51251a5ed0e9f
 +    }
 +
 +    protected int getBlockLightValue(final BlockPos blockPos, final ChunkAccess chunk) {
++        if (!this.hasBlockLight) {
++            return 0;
++        }
 +        final int y = blockPos.getY();
 +        final int cy = y >> 4;
 +