Cycles: Correction for node tail copy on packing BVH

This is harmless for now because tail of the node is zero in there, but better
to fix it early so in the case of extending BVH nodes this code doesn't give
issues.

1 files changed, 6 insertions, 5 deletions

diff --git a/intern/cycles/bvh/bvh.cpp b/intern/cycles/bvh/bvh.cpp
index e7141c9ec64..eafb611b015 100644
--- a/intern/cycles/bvh/bvh.cpp
+++ b/intern/cycles/bvh/bvh.cpp
@@ -479,11 +479,12 @@ void BVH::pack_instances(size_t nodes_size)
 
 				pack_nodes[pack_nodes_offset + nsize_bbox] = data;
 
-				if(use_qbvh) {
-					memcpy(&pack_nodes[pack_nodes_offset + nsize_bbox+1],
-					       &bvh_nodes[i + nsize_bbox+1],
-					       sizeof(int4) * (nsize - (nsize_bbox+1)));
-				}
+				/* Usually this is gonna to copy nothing, but we'd better to
+				 * beprepared for possible node size extension.
+				 */
+				memcpy(&pack_nodes[pack_nodes_offset + nsize_bbox+1],
+				       &bvh_nodes[i + nsize_bbox+1],
+				       sizeof(int4) * (nsize - (nsize_bbox+1)));
 
 				pack_nodes_offset += nsize;
 			}