Fix segfault from reading bad number of indices

source/Irrlicht/CGLTFMeshFileLoader.cpp

@@ -194,7 +194,7 @@ static u16* getIndices(const tinygltf::Model& model,
 	const auto& indicesBuffer = model.buffers[view.buffer];
 	return readIndices(
 		BufferOffset(indicesBuffer.data, view.byteOffset),
-		model.accessors[0].count);
+		model.accessors[accessorId].count);
 }
 
 CGLTFMeshFileLoader::CGLTFMeshFileLoader()

source/Irrlicht/tests/testCGLTFMeshFileLoader.cpp

@@ -91,6 +91,7 @@ TEST_CASE("blender cube") {
 		CHECK(indices[0] == 0);
 		CHECK(indices[1] == 3);
 		CHECK(indices[2] == 9);
+		CHECK(indices[35] == 16);
 	}
 
 	SECTION("vertex normals are correct") {