Adding remark

encoder/basisu_frontend.cpp

diff --git a/encoder/basisu_frontend.cpp b/encoder/basisu_frontend.cpp
index ba5a00b..f7d47e9 100644
--- a/encoder/basisu_frontend.cpp
+++ b/encoder/basisu_frontend.cpp
@@ -486,6 +486,7 @@
 		m_selector_cluster_block_indices.swap(new_selector_cluster_indices);
 		m_selector_cluster_uses_global_cb.swap(new_selector_cluster_uses_global_cb);
 
+		// This isn't strictly necessary - doing it for completeness/future sanity.
 		if (m_selector_clusters_within_each_parent_cluster.size())
 		{
 			for (uint32_t i = 0; i < m_selector_clusters_within_each_parent_cluster.size(); i++)