Turn the cutout off crash off

- MaterialEncoder would trigger an indexing of CutoutShaders.OFF, though
  PipelineCompiler would explicitly not index OFF
- This caused a crash on instancing when MaterialEncoder would delete
  all pipeline shaders while instancing was trying to upload the packed
  ubershader uniform

common/src/backend/java/dev/engine_room/flywheel/backend/compile/PipelineCompiler.java

@@ -61,15 +61,12 @@ public GlProgram get(InstanceType<?> instanceType, ContextShader contextShader,
 		MaterialShaderIndices.fogSources()
 				.index(fog.source());
 
-		boolean useCutout = cutout != CutoutShaders.OFF;
+		// Same thing for cutout.
+		// Add OFF to the index here anyway to ensure MaterialEncoder doesn't deleteAll at an inappropriate time.
+		MaterialShaderIndices.cutoutSources()
+				.index(cutout.source());
 
-		if (useCutout) {
-			// Same thing for cutout.
-			MaterialShaderIndices.cutoutSources()
-					.index(cutout.source());
-		}
-
-		return harness.get(new PipelineProgramKey(instanceType, contextShader, light, shaders, useCutout, FrameUniforms.debugOn()));
+		return harness.get(new PipelineProgramKey(instanceType, contextShader, light, shaders, cutout != CutoutShaders.OFF, FrameUniforms.debugOn()));
 	}
 
 	public void delete() {